Home: KOI Talk: Pond Water Quality:
Rearing Koi in Fiberglass tank



rickyer8
Novice

Jul 13, 2001, 8:37 PM


Views: 173496
Rearing Koi in Fiberglass tank

I hereby starting a forum on Koi keeper who rear their fish in fiberglass tank. I have been in this forum for only few days and most of the Koi keeper has pond for Koi. But I only have fiberglass tank to keep my Koi.Does the problem for rearing Koi in pond and tank the same? I need more discussion on problem encountered rearing Koi in fiberglass tank. Coz I need more advice myself.Thank.


tstang
User

Jul 13, 2001, 9:30 PM


Views: 173419
Rearing Koi in Fiberglass tank

I personally do not think you need a new forum for fiberglass tank than pond. I may agree there may be different in size but the basic concept is the same.

In fiberglass, it may be harder to maintaine the pH compare to concrete pond, but this can be rectify by just using oyster/coral chips to buffer it.

The main point here is not to over stock your tank/pond with koi and have the adequate size for your koi. Another thing i notice is the filtration system for most fiber tank is too small for the tank.

As i pointed before, just follow the basic concept for quality water condition and it's the same.

"Elimination of toxic must be greater than the koi discharge, to maintain quality water"




Mark
Veteran

Jul 14, 2001, 1:08 AM


Views: 173419
Rearing Koi in Fiberglass tank

Hi rickyer8

Lands in Singapore are costly and many of us live in high rise buildings. In view of this, many hobbyists rear their koi in fiberglass tank.

We will try our best to help if you have questions.


rickyer8
Novice

Jul 14, 2001, 9:04 PM


Views: 173419
Rearing Koi in Fiberglass tank

Thank you Mark and Tstang.


tstang
User

Jul 16, 2001, 10:14 AM


Views: 173419
Rearing Koi in Fiberglass tank

Hi Rick & Mark,

Sorry, I do not mean it this way. I'm not trying to say koi must be rear in the pond. What i'm trying to get the message over is that by rearing in fiber tank does not denote it's not as good or even better than in concrete pond. Just as the basic concept is the same.

We all are koi lovers, and this is our common goals. To rear and enjoy our lovely koi.



rickyer8
Novice

Jul 16, 2001, 6:37 PM


Views: 173419
Rearing Koi in Fiberglass tank

Hi Mark,

What is the best temperature for rearing KOI?
I am currently keeping the tank water temp at 28 Degree Celsus.Is it alrigkt? What is the PH of the water for KOI? Will putting water floating plants in the tank benificial to the KOI? Please advice. Thanks.


Mark
Veteran

Jul 16, 2001, 9:52 PM


Views: 173419
Rearing Koi in Fiberglass tank

My friend
Where do you live? Do you have 4 seasons in your country?

In countries like Singapore and Malaysia, temperature is not a problem. I only use 28C to 33C when treating sick koi. Although koi are hardy, its best to have them in a constantly maintained temperature at a pH of betw 7 to 9.

Some of these floating plants are loved by koi. Roots may gets in the way and your pump may be all choked up. Best to keep the hobby simple.

Good luck.


rickyer8
Novice

Jul 19, 2001, 11:00 PM


Views: 173419
Rearing Koi in Fiberglass tank

Hi Mark

What is biological filter? Is having water plants in the tank act as some sort of filter for Nitrates? Why afraid of water plants root getting choked in the water pump? Please advice.



Khoobg
Webmaster


Jul 25, 2001, 4:22 AM


Views: 173422
Rearing Koi in Fiberglass tank

Pictures by Mr. Eric Lim,









Eric Lim
User


Jul 25, 2001, 6:13 AM


Views: 173419
Rearing Koi in Fiberglass tank

Hi! rickyer8,

Let me share with you some of my in-door koi keeping experiences.
I'd been keeping in-door koi for 13yrs. The above 4 photos are my present collection. It's a 1.8tons (including 40% of filtration) tank. Smile

Mr. tstang was wrong to say there's not much differences in In or Out-door Keeping. Let me share with all some tips;

1. Never keep yellow colour (Yamabuki, Kigoi) = Always fade fastest. Blue - also fade (Shusui,Asagi).

2. Never keep Matsuba type (pine-cone) - Kin/Gin/Hariwake Matsuba, Goshiki, Koromo, Asagi, Aka/Ki Matsuba, Kujaku, etc = Always fade.

3. Koi lustre/ sheen will lost in 1 to 3 months time. Hikarimono types the fastest. Of all the shining types - the best to keep is Platinum Ogon of Normal/Mirror/Leather Doitsu types. Silver will be pure without orange dots. Out-door common problem.

4. If bloodlines are good, fade lesser or slower. Applies to all types. Kinginrin = not a problem. The snort (mouth) of indoor koi tends to be whiter than outdoor.

4. Best to keep male koi. Female tends to go pot-belly. No depth/ space for exercise.

5. Be prepare for slow growth. If kept too many like me - get `bonsai' koi. (Actually I prefer this, don't eat me bankrupt). Wink

6. Chaigoi, Soragoi & Ochiba-shigure are the best types to keep - don't change much.

7. Gosanke are the most difficult to keep - most likely to lose out. Don't buy at 10 to 15cm. Buy above 15cm = more stable. Better if at 20cm.

8. Sumi is hard to maintain - must use coral chips (last compartment in small amount) & strong aeration. I'm using two Hi-Blow pumps.
FG tank pH can crash easily - must buffer with coral chips, etc. I'd ever experience pH at 4.5 & < the chart reading.

I'd paid alot of school fee to learn these. Cull off many. Presently, I've a out-door FG tank where I put my yellow, matsuba, Gosanke types = all are going well. But once put in-door = sob!
Well, at least now I got room to play. Those you see in photos are NOT from the outdoor tank. All have been in it,> two months, some years.

FYI. Pls. feel free to comments & share experiences.
Cheers. Smile


Rdgs,
Eric Lim



(This post was edited by Eric Lim on Dec 7, 2002, 9:00 AM)


welson
Novice

Jul 25, 2001, 8:24 AM


Views: 173419
Rearing Koi in Fiberglass tank

Hi

Eric missed out a photo that showed a mattress ontop of his tank for his bed. Just joking.

I witnessed Eric collection and the way he maintain his tank. Man, we need to learn from him.

RG


dttk
Veteran

Jul 25, 2001, 7:15 PM


Views: 173419
Rearing Koi in Fiberglass tank

Hi Eric, nice pictures. Seems like you keep your tank clean and water is clear. Is the water inlet to filter via some sort of bottom drain or a submerged pump in the tank? What is your water pump output? Smile


rickyer8
Novice

Jul 25, 2001, 8:08 PM


Views: 173422
Rearing Koi in Fiberglass tank

Hi Eric Lim

Glad to hear from an expert.May I know how big is your FG tank? And is it a custom made? Where and how much you have paid for it? what do you put in the filter tank? Sorry for asking so many questions. Actually, I have lots of questions to ask but didn't want to scarce you off.


Eric Lim
User


Jul 26, 2001, 7:02 AM


Views: 173419
Rearing Koi in Fiberglass tank

Hi! To all,

Hey! Welson, see you'd hop over from Cyberfins = to & from, that's good. Smile
So!, where is No. 10 Ganges Aq. now? Pls. email me info. Thanks.

Hi! Dr. dttk, to your;
Q1. = the inlet is by gravity means of 3ins. dia. pipe. Must try not to use pump to feed in to filter - this way the wastes are broken up & very hard to settle down.

Q2. = As FG tank are small capacity, I make use of this advantage to use Ehiem pumps x 2pcs. of 2,400 litres/hr. in total cap. Had serviced me for > 10yrs. & never fail once.
Unlike centrifugal submerged pump which use mechanical seal to seal the motor (life-span aver. is 2-3yrs), this design is such that it use electro-magnetic field to move the impeller, thus the electrical coil is never in contact with water as there is no wear & tear unlike in the mechanical seal.


Hi! rickyer8 - Oh! many questions. Join a koi club lah! Learn faster if you can find & follow a senior experience member.
Sometimes the best way to learn is by your own experiences & mistakes = always will remember for life. (Pay to Learn) Wink

Tank size = main tank is 6ftx5ftx1.5ft of water. Filter is another 40% of above.

Made = yes, is customized.

Where = FG maker closed already. How much? = S$2,000 @ yr. 1991 price. Now can never get at this price man!!!

Filter material = 1st. Knock out comp. - NIL, 2nd comp. - brushes as mechanical filteration. 3rd - pumps chamber x 2pcs, pumping up to overhead bio. filters.
Overhead 1st & 2nd comp. - fishing net, 3rd. - cockle shells. Drop down back to tank.

Aeration - 2 Hi-blow air pumps servicing air enough for 20pcs of large size air stones (2ins. dia).

Standby emergency units - Shiruba AC/DC K10000 model (@S$60)x 3 pcs.


Hope I'd answered your enquiries. Cheers & happy koi hunting.


Rdgs,
Eric Lim



rickyer8
Novice

Jul 26, 2001, 5:24 PM


Views: 173419
Rearing Koi in Fiberglass tank

Hi Eric Lim

You have keep quality stocking of Koi. The Kohaku are very nice as well as Tancho. They are about 20-25cm,right? Can you tell me where did you buy these beautiful Kois?


dttk
Veteran

Jul 26, 2001, 6:21 PM


Views: 173419
Rearing Koi in Fiberglass tank

Thanks Eric.


Joshua Lee
User

Jul 27, 2001, 9:31 PM


Views: 173419
Rearing Koi in Fiberglass tank

Superb koi, Eric! This proves what we suspected all along - tender loving care and good water will raise quality koi whether indoor or outdoor!

By the way, to answer Rickyer8's query, water plants are a good absorber of nitrates but tend to be messy because most Koi will eat up the roots or munch on the leaves. This will leave small pieces of broken leaves/roots which get sucked into the pump and clog it up. I used to have lots of water hyacinths, water lilies, etc but gave them up as it was too much trouble cleaning up the pump. Now life is much easier and I can spend more time admiring the lovely fish.

Best regards
[biggrin]


rickyer8
Novice

Jul 27, 2001, 11:40 PM


Views: 173419
Rearing Koi in Fiberglass tank

Hi Joshua,

I did not put water plants in my FG tank. Since water plants can absorb nitrates, I have put them in an improvished filter by using sterofoam box. The water pump water from the FG tank to this box with water plants in it and water will then flow down to another box. I have separate the box below into chambers with matting,charcoals, ceramic rings and cotton mats.Will the plants in the first box acts as a filter for nitrates? The problem I am facing now is that the wastes from the KOI cannot be effectively pump up to filter. The wastes alway left on the bottom of the FG tank and I have to clear them up to prevent high ammonia level. Please advice on how to resove this problem so as to save the effort of clear wastes.


Joshua Lee
User

Jul 28, 2001, 10:09 PM


Views: 173419
Rearing Koi in Fiberglass tank

Hi Ryker88

Looks like you got your plants at the first stage of your filter. I think plants should be placed at the last stage of the filtering system, after the first two stages:

I) 1st stage - mechanical filter (settlement chamber or brushes or filter mats places perpendicular to the flow of water)

ii) 2nd stage - biological filter (consisting of filter mats or other suitable media placed the same direction as the flow of water - acts as a breeding ground for good aerobic bacteria to covert ammonia/nitrites to nitrates). Your carbon can be here as well.

The rationale of putting plants last is to: i) Let the plants eat up the nitrates produced by the biological filter at the second stage.

ii) The water will be cleanest at this stage as the heavy wastes would have been trapped at the first stage (mechanical filter). So this won't clog up the roots of your plants with wastes which may be messy.

As for the wastes at the bottom of the fibre glass tank I guess you could probably suck them out using a wet/dry vacuum cleaner or one of those manually operated ones if you don't have a bottom drain.

Hope this makes sense. I am still learning the ropes of this wonderful pastime.

Have fun and best regards
[biggrin]

Josh


tstang
User

Jul 29, 2001, 11:47 PM


Views: 173419
Rearing Koi in Fiberglass tank

Hi Eric and co,

looks like i've been missing all the fun here...Nice koi...really nice...the water is really good...

Regarding the FG tank, i know someone who can do the same thing, customised FG with build in filter ( bottom draine ) cheaper than RM 2500 for the same FG size. It's located in Malaysia -KL...It's quite good as everything is build in....Good for start-up koi hobbist...Do not need to crack their heads on calculation & stuff..

Last few days ago i, i read about this filtration system, so called "the Answer". It's very interesting and i bet it'll change the filtration system design. It's capable of filter off partical as small as 100 micron in size and can be attach to current vortex system.

I personally think with this system, we can say goodbye to brushes and japanese netting....All we need is Bio-ceramic with the largest surface area for Bio-filter, thus reducing the physical size of the filtration system.

ie.Filter chamber consists of

1.Vortex/Sedament Chamber with "the Answer" (mechanical)
2.Bio-Filter

That's all...it's that simple..



Joshua Lee
User

Jul 30, 2001, 7:54 AM


Views: 173419
Rearing Koi in Fiberglass tank

 
http://www.koikichi.com/the%20answer/intro.html

Read about the 'answer' at Waddy's Infiltration website. Impressive. So's the money, all 925 British pounds of it. Oi, how to get past the "home" minister?



tstang
User

Aug 2, 2001, 12:54 AM


Views: 173419
Rearing Koi in Fiberglass tank

Yup...understood..

."home" ministry very hard to get approval.....

but...solve all problems....

think long term....


eeegoh
Novice

Aug 7, 2002, 11:03 AM


Views: 173352
Re: [Eric Lim] Rearing Koi in Fiberglass tank

Hi Eric,

I have been looking for a reliable and economical AC/DC unit for some time. Please kindly advise where you buy your Shiruba AC/DC air pumps.

Thank you N Regards,

Patrick Goh


Eric Lim
User


Aug 8, 2002, 3:42 AM


Views: 173337
Re: [eeegoh] Rearing Koi in Fiberglass tank

Hi! patrick,

You still can get the Shiruba K10000 AC/DC air pump at Rainbow Aquarium. Cost around $60 - 80.
It's using only alkali D size batteries x 4 pcs.
I prefer alkali batteries as it can last >2yrs.

If not - nearby Petmart also selling AC/DC pumps, different model, comes with a dry rechargable battery. This type after 1.5yrs. of usage, if you test it to run = battery only can run 20mins & then die off.

That's why I prefer the alkali batteries.Most of the time, I replaced the alkali batteries not because no strength, but because after 2-3yrs. - $ is well spent lah! Still can give for your kid's portable Hifi usage.
No wastage. Wah lau! Fully Maximise....Crazy
Also scare the battery leak from inside & corrode the pump contact points.

If you are looking for rechargable dry battery - go to Sim Lim Tower (not Square) basement. There is a shop near the escalator - selling all kinds of batteries. You name it - he got it. Tongue


Rdgs,
Eric Lim


(This post was edited by Eric Lim on Aug 8, 2002, 3:45 AM)


eeegoh
Novice

Aug 8, 2002, 6:19 PM


Views: 173311
Re: [Eric Lim] Rearing Koi in Fiberglass tank

Hi Eric,

Thank you very much for your advise. I shall go to rainbow and petmart

to look for the AC/DC air pump.

Thanks N Rgds.


jsoon
User

Aug 21, 2002, 12:47 PM


Views: 76924
Re: [Joshua Lee] Rearing Koi in Fiberglass tank


In Reply To
http://www.koikichi.com/the%20answer/intro.html

Read about the 'answer' at Waddy's Infiltration website. Impressive. So's the money, all 925 British pounds of it. Oi, how to get past the "home" minister?

Has anyone tried putting the answer in a KOI FG tank before ? I heard the answer is meant only for 10 ton pond only.



SMW1
Veteran

Aug 21, 2002, 9:13 PM


Views: 76910
Re: [jsoon] Rearing Koi in Fiberglass tank

There are three sizes of the answer. I personally need two of the big ones for my new pond. I don;t see any reason that they can;t be in a FG tank. What sort of volume are you looking at and how fast are you goingto to pass the whole lot through your filter ?

You will also be paying too much for it if you are looking at 925.

You can get this for 795 if you shop around. I can;t advertise so you will have to drop me a message and I'll point you in the right direction.


jsoon
User

Aug 22, 2002, 5:52 AM


Views: 76896
Re: [SMW1] Rearing Koi in Fiberglass tank

Hmmm....I believed most of our pond in government flat are about 1 ton in size. Does the Answer cater for such a size. BTW, how do you fit the answer in a filter box ?


SMW1
Veteran

Aug 22, 2002, 9:31 AM


Views: 76887
Re: [jsoon] Rearing Koi in Fiberglass tank

Yes the 325 should be ok for a 1 tonne pond. This need to sit into a copartment all by itself. it can be mounted upright or upside down (sometimes even on its side) depending on your setup. A round chamber like a vortex is usually a good place to put it. However you need to have enough room around it in ordr for the blow back pump to work correctly.

Have a look here for specifications. http://www.evolutionaqua.com/

Stuart


micky
User

Oct 18, 2002, 8:31 AM


Views: 76851
Re: [eeegoh] Rearing Koi in Fiberglass tank

Hi Eric
I just bumped into your posting and perhaps you
can help me too.
I have just setup a 8'x8'x4' fibre-glass tank,
no problem with the filtration ..etc, just like
to know how you keep the pond bottom free of
debris. Is it possible to connect a matrix of
pipes with holes to suck up the dirt to a pump?
I put an EZ sub200 pump at the center but debris
tend to collect around the corners, of course we
can wait for the kois to sweep it around towards
the pump. I experimented by modifying the pump
inlet to connect to a 40mm pipe, then reduce to
30 mm from a T-connector, the pipeworks form a
sqaure around the bottom, then further split by T
connectors to cover the area at center but the
suction taper off very quickly away from the pump.
I am just thinking there must be a simple way to
keep the bottom clear and clean!
"dttk" has suggested pushing the debris using
powerheads towards the pump and do away with the
pipeworks, any good advice ?
Regards, Micky


SMW1
Veteran

Oct 18, 2002, 9:30 AM


Views: 76845
Re: [micky] Rearing Koi in Fiberglass tank

Hi Micky,

That's one of the majo problems with having a pump fed rather than gravity fed filter.

The pump can not draw in the waste from all over the pond bottom unless the bottom of your pond is benched at a large angle towards the pump.

I also have this problem with my old current pond. It's a liner pond which had no benching and the filter is fed from 2 pumps in the pond. I currently use a pond vac to hover the floor of the pond every week. It only takes about 30 minutes and keeps the pond nice and clear.

Stuart


micky
User

Oct 18, 2002, 11:34 AM


Views: 76840
Re: [SMW1] Rearing Koi in Fiberglass tank

Hi Stuart
Thank you for your contribution.
The vac part is what I am trying to avoid.
There is not much I can do with the fibre
tank and it is already done and running.
Do you think reducing the size of the pipes
from 30 mm to 20 mm, & replace the T-connectors
with nipple heads, then make the holes smaller
from 8 to 5 mm...etc. Do you think these efforts
will improve the suction?
Hope to hear from you again soon! Smile
Regards, Micky


koifun
Veteran


Oct 19, 2002, 4:41 AM


Views: 76815
Re: [micky] Rearing Koi in Fiberglass tank

Micky

I have a similar FB inground pond with pump fed system. Facing the same problem , initially I used a rubber wiper to wipe the dedris at the bottom once a week to the pump surrounding to be siphoned off from there. Now with a hibrow, it seems that the debris are caused by the turbulent air bubbles to suspend in the water during feeding as the kois are moving rapidly - I believe this will help debris being sucked off by the pump constantly though still not 100% but I don't wip the bottom of the pond any more as the debris are not that significant. The botom seem crystal clear most of the times. Not sure u notice the similar observation.

RgdsSly




  • "Talk sense to a fool and he calls you foolish. - Euripides"
  • CoolSmileTongueSmile


    micky
    User

    Oct 19, 2002, 6:57 AM


    Views: 76807
    Re: [Koifun] Rearing Koi in Fiberglass tank

    Hi Koifun
    Thanks for responding.
    You mentioned "hibrow", I supposed this is some kind of small pump generating a current to blow the debris towards the pump. I wonder if the current is too strong, won't it stress out the kois? Please tell me brand & capacity of this gadget and where to take a look, I live in Singapore. BTW, did you try out the pipe matrix way to suck out the debris?Smile
    Regards, Micky


    koifun
    Veteran


    Oct 19, 2002, 9:47 AM


    Views: 76803
    Re: [micky] Rearing Koi in Fiberglass tank

    Hi, Micky

    I am in singapore too. Hiblow is an air compressor similar to air pump but of higher capacity and said to be more durable. The benefit of hiblow is to ensure the water is saturated with oxygen at the same time assists the bacteria in nitrification. What I told u is the additional benefit I observed - that is helping debris to suspend in the water thereby sucked out through the pump in the circulation. As debris is constantly sucked out and being stirred to suspend, it hardly settle down at the bottom.

    I am using Hiblow 40 which has a power rating of 38W - I am not sure of capacity but I know there are two more model of HB20 and HB80. U can try petmart to get reference price. Hiblow is the brand name - I think from Japan ( may be wrong - not sure).

    Pipe matrix sound like crisscross pvc pipes with holes drilled on them and one end to pump inlet - just guessing! Can u enlighten if my guess was wrong?

    Rgds




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    micky
    User

    Oct 21, 2002, 3:36 AM


    Views: 76778
    Re: [Koifun] Rearing Koi in Fiberglass tank

    Hi Koifun
    OK I now understand how this "Hiblow" works, my only concern is that the currents may stress out the kois, did you use some kind of timer device to turn it on/off or is it running all the time? Do you think turning it on for 10 mins every 2 hours is enough? I have a conern on the suspended waste, I would rather it be kept at the bottom and not be left swrilling around - any comments?

    The pipe matrix was my original solution, what you described is quite exact. In theory it should work, but my installation didn't. I used 30mm pipes with 8mm holes at 80mm intervals, perhaps I should use smaller pipes, 5mm holes at 120 mm intervals, this may just increase the suction presure - will try this out when time permits. If you are interested in the outcome I can keep you posted.Smile
    Regards, Micky


    koifun
    Veteran


    Oct 21, 2002, 8:40 AM


    Views: 76765
    Re: [micky] Rearing Koi in Fiberglass tank

    Hi, Micky

    I do agree that initially they seems slightly stressed but soon they learn to like it by playing with the strong water current. You can see that they are happier and the water quality is visually cleaner and less sluggish.

    I turn the Hiblow on for 24 hrs a day since there are more benefits to do so. I think you concern might be due to the fact yours is a glass tank and the churning of water vigorously seems stressful to both the kois and human outside the tank. That is why kois should be kept in FG so that outside/inside will not affect each other - u are happy and the kois are too.

    Rgds




  • "Talk sense to a fool and he calls you foolish. - Euripides"
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    koifun
    Veteran


    Oct 21, 2002, 8:52 AM


    Views: 76762
    Re: [Koifun] Rearing Koi in Fiberglass tank

    Micky,

    Sorry, I think I got mix up, yours is not a glass tank.

    It will be good if u can share your result of pipe matrix with our friends here after some trial - that is why I think this forum is very friendly and helpful.

    Rgds




  • "Talk sense to a fool and he calls you foolish. - Euripides"
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    micky
    User

    Oct 21, 2002, 9:10 AM


    Views: 76760
    Re: [Koifun] Rearing Koi in Fiberglass tank

    Hi Koifun
    The tank is a customised FG 8x7x4ft. I also have a concrete pond which is not doing quite well - limited by its design. When the FG tank is fully bio charged, I will move all the kois over, then give the concrete a good flush and redo all the pipe works and filter system. Its been quite fun doing it the DIY way. I have learnt not to depend on the pond contractor to much. This forum is great, I am trying to pull away though - getting a little addicted.Blush
    Thanks & regards
    Regards, Micky


    mwinnig
    Novice

    Apr 11, 2003, 7:47 PM


    Views: 76646
    Why Fiberglass???

    Can anyone tell me WHY FIBERGLASS??? Here in the U.S., fish tanks are glass or plexi-glass. Ponds are usually EDPM (rubber) lined, or a new composite material. Big containers used for overstock, fish bait, etc. tend to be plastic or aluminum. We tend to use fiberglass to make things like sports cars, motor boats and the like. I know large f.g. tanks are used commercially, but not sure for what. I would think that large plastice tanks would be produced in Asia, just wondering why I hear so much about f.g.. Also, pre-formed ponds with built-in ledges are becoming quite common at pet, garden and home improvement shops as fast and easy (and fairly cheap) ways to build a small (usually under 200 gallons) pond.

    Thanks!


    koifun
    Veteran


    Apr 12, 2003, 4:25 PM


    Views: 76632
    Re: [mwinnig] Why Fiberglass???

    HI, mwinning

    I think the main reason why FG is used for kois' pond is its hardiness especially for a relatively large dimension of a pond compared to fish tank. FG pond can be easily made to shape of your choice and relatively easy to DIY as compared to plastic which usually required to be made in a factory. Besides, FG is resistant to weathering and temperature variations and provides a water tight, smooth and easy to clean surface.

    A FG pond placed inground has many advantages as follow :

    1. Easier to build than a concrete pond.

    2. Cheaper.

    3. Can be disposed of easily when giving up the hobby - just remove instead of hacking the concrete. The FG removed may be resold to someone.

    4. The outlook of the FG pond can be constructed to look like a concrete pond by using stones and tiles to camouflag the edge.

    5. There is virtually no leakage problem.

    Hope I am making sense to you.

    Sly




  • "Talk sense to a fool and he calls you foolish. - Euripides"
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    mwinnig
    Novice

    Apr 12, 2003, 6:49 PM


    Views: 76625
    Re: [koifun] Why Fiberglass???

    Thanks, NOW I GET IT! So most of the FG ponds or tanks people are referring to are custom, in-ground, home-built installations? That makes sense now. Also, I have done a bit of F.G. work myself, and though the stuff is a bit toxic it is NOT that hard to work with. (I could see it being kind of cool to do large installs with a portable large-scale F.G. setup (spraying chopped glass) vs. hand lay-up. Any idea on approx. cost to build? EDPM is about $1US per sq. foot, or a bit over $3US per sq. meter.

    Thanks again. You've certainly got me thinking!


    koifun
    Veteran


    Apr 13, 2003, 5:50 AM


    Views: 76614
    Re: [mwinnig] Why Fiberglass???

    Sorry, I couldn't really pinpoint to the cost especially in different location.

    I would say it is not too expensive given my location here in Singapore and I would grossly estimate it to no more than US$300 for a FG of around 8' x 4' x 3'. Hope that help.

    Sly




  • "Talk sense to a fool and he calls you foolish. - Euripides"
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    cwnchong
    Koi Kichi

    Apr 14, 2003, 7:31 AM


    Views: 76589
    Re: [mwinnig] Why Fiberglass???

    Hi Mwinnig,

    What Koifun meant is that FG tank is convenient, light weight and can be placed anywhere even in-ground. Most FG tank are bought either off the shelf or custom made to suit individual requirement and is not common to DIY. Currently most FG tank are factory made. It will be very adventurous to DIY a tank. Even custom made tank are not made in situ, they are precasted prior to delivery. The reason for this is probably due to the need of an autoclave or curing house. The handling of the raw material is also another hazardous issue.


    mwinnig
    Novice

    Apr 15, 2003, 12:46 AM


    Views: 76564
    Re: [cwnchong] Why Fiberglass???

    Thanks to you both for the info.. That's why I was a bit puzzled. You can buy a 192 gallon kidney-shaped molded plastic pond with one ledge (total about 2' deep for $74US at Home Depot in the US, (or for about double that a high-rent district pet shop). They do great things here with plastics, and I have never seen a pre-formed f.g. pond or tank setup for sale. I did, however, see a nice 30 gallon cube tank with glass cover and light for $129 on a really cool $169 (all USD) stand. It would be a nice place to grow some baby koi.


    123456
    Novice

    Dec 2, 2003, 3:39 AM


    Views: 76036
    Re: [tstang] Rearing Koi in Fiberglass tank

    Hi,

    I am new to this forum and have been following and reading all the threads that has been posted. Very informative and one of the best site ever i would say. Kudos to the people giving their valuable inputs.

    This inputs has surely given me some hope that I too can have my own KOI's too. As such I am interested to find out the location and contact no of the person you mentioned here for a FG tank. Like you said it would be good for a start-up koi hobbist like me.

    Thanks.

    Siva


    alk12
    Novice


    Nov 16, 2005, 9:58 AM


    Views: 69348
    Re: [123456] Rearing Koi in Fiberglass tank

    hi..

    i am new to this whole koi things...i keep my koi in the fiberglass tank (1.5 x 2 M)...and only have 6 koi at the moment..i'm only starting this hobby for 1 month...i use 4 chamber filter, the first one i use cotton, second one i use brush, third one i use bio ball and the last chamber i use ziolite...in this 2 - 3 days my water become greenny, not clear...my question is :
    - what do you guys think about my filter??...am i using a right media ??...
    - why my water is green, is it because of algae?...if yes, how do i overcome this problem?
    - do you guys ever heard og biolite G ??can i use it ??...

    please help me ...thank you


    koiguyoz
    Koi Kichi


    Nov 16, 2005, 10:22 AM


    Views: 69346
    Re: [alk12] Rearing Koi in Fiberglass tank

    alk12 your tank is experiencing someting close to the "new pond syndrome" where the filter hasnt grown enough good bacteria as yet to consume the wastes put out by the kois.

    Physically we don't know how large the filter is. Can you give us an idea by measuring it by length, width and height?

    The water is green because of floating phytoplanktonic algae. The algae is a plant. The plant will give off oxygen when it receives sunlight, but will release carbon dioxide during the shadier and night time parts of the day.

    I would recommend:
    *Cleaning all media in tank or aged water only.
    *Cleaning the cotton and brush gently for the first few months (a squeeze to remove loose dirt is enough, you dont need the media super clean).
    *A water change of 10% of tank water every week until the water clears, then around every 2-4 weeks thereafter.
    *Increasing aeration through the use of a large air pump, DIY venturi etc.


    alk12
    Novice


    Nov 17, 2005, 8:28 AM


    Views: 69323
    Re: [koiguyoz] Rearing Koi in Fiberglass tank

    about the measurement of my filter, i use a cylinder with diameter 75cm and depth 1m...and my fiberglass tank measurement is 1.20m (width) x 2 m (lenght) x 1 m (depth)...do you think it's enough??...and can you show me how to calculate it ??..

    thank you for your response


    alk12
    Novice


    Feb 6, 2006, 10:47 AM


    Views: 68536
    Re: [koiguyoz] Rearing Koi in Fiberglass tank

    hi..

    i am just wandering, if i keep my koi in fiber glass tank, can the koi grow big??...


    alk12
    Novice


    Feb 6, 2006, 10:54 AM


    Views: 56618
    Re: [Khoobg] Rearing Koi in Fiberglass tank

    hi..

    i keep my koi using fiberglass tank with dimension 1.5m (w) x 2m (l) x 1m (d)...the water about 60cm deep...now i have around 12 fish....my question is :
    - can the fish grow big in fiberglass tank??
    - how big can it grow??....
    - can it grow as big as the koi in a pond??


    thank you


    koiguyoz
    Koi Kichi


    Feb 10, 2006, 4:42 AM


    Views: 56576
    Re: [alk12] Rearing Koi in Fiberglass tank


    In Reply To
    about the measurement of my filter, i use a cylinder with diameter 75cm and depth 1m...and my fiberglass tank measurement is 1.20m (width) x 2 m (lenght) x 1 m (depth)...do you think it's enough??...and can you show me how to calculate it ??..

    thank you for your response



    To calculate the volume of cylinders, the formula is:
    pi (3.14) x radius squared (r2) x height (h)


    comfy
    New User

    Mar 22, 2007, 11:32 AM


    Views: 54873
    Re: [koiguyoz] Rearing Koi in Fiberglass tank

    Hi there, I am moving house and in need to custom make a new FG tank...can anyone help me with the
    source in Singapore? looking for 6 ft x 4 ft x 2.5 ft with 3 stage internal filter....thanks alot !!


    koivin
    Novice

    Mar 24, 2007, 4:09 AM


    Views: 54827
    Re: [comfy] Rearing Koi in Fiberglass tank

    Hi Koiguyoz! U can find the size of FG tank u're looking for at Summer Koi Farm at Seletar or Max Koi farm at Kranji. Cheers! Wink


    comfy
    New User

    Mar 26, 2007, 10:28 AM


    Views: 54767
    Re: [koivin] Rearing Koi in Fiberglass tank

    Thank you - may friend Koivin....Do you have the address for Max Koi Farm...I lost contact with Max for years and hope to visit him again...Max really have excellent koi...I still have the Cha Goi from him years back.. SmileSmile