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Nirite and Flashing problem

 




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colin00
Novice

Jun 19, 2002, 10:53 AM

Post #1 of 35 (91122 views)
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Nirite and Flashing problem Can't Post

Hello all, have been reading here for a while, but have not posted before. I am in the UK.

I am having a new pond built in the garden and it'll be very nice and about 5000 gallons.



However, that's not built yet, and the old pond had to go. So I got a 250g f/g holding tank with filter (brushes, flocor and matting, fed by Airmax 3500 and an air pump blowing 2 x 50mm air stones in the filter and one 12" aqaurium air block in the tank) set up in the garage. It's holding the one koi from my old pond we're keeping (the other fish were normal carp, goldfish, etc, and a neighbour wanted them) and we bought 6 small goldfish to get the filters matured.

We set up the tank a month ago. We used some Boi-start and a bit of ABA. We were adding more ABA about once a week.

We added 6 small goldfish after two weeks and all measurements were more or less perfect (PH 8, Am 0, Nit 0). We also added some more ABA at that time.

After a few days Amonia had risen slightly. Then that tailed off, and now for about a week we've noticed something other than 0 nitrite. It went up slightly. We now had to add the 9" Koi from our old pond. We had no choice, as the old one was being ripped apart.
But 2 days ago it was at 0.4mg on a Tetra kit. I have been carrying out 20% water changes nightly and using Interpet Water safe or water clear? The thing that protects against chlorine anyway. I've also added about 200g total of table salt (only salt with small anti-caking agent - checked that) as the books say this helps the fish cope with nitrite, and been adding more ABA.

Just before he went in we added a general Interpet anti-parasite treatment.

Last night I thought the colour on the test had reduced slightly, now just about 0.3mg.

The Koi has been scratching himself against the edge of the tank and the airstone, not constantly maybe, but quite a bit.

So, is it safe to keep him in there, or should we find somewhere else? Or will that just delay the process his extra waste is causing anyway?

Should this finally tail off over the next few days? The thing is we have another koi waiting to come home from Madidenhead at Hickstead and we don't want to bring that home while it's like this, but will adding him just make this all happen again?

Any advice gratefully received.

Kind regards, Col.

Cheers, Colin.


johnson lee
Veteran

Jun 19, 2002, 11:36 AM

Post #2 of 35 (91062 views)
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Re: [colin00] Nirite and Flashing problem [In reply to] Can't Post

Hi Colin

Finally after browsing thru the forum you have started to write! Good for you!Wink Since you are from UK, I have no doubt at all that Stuart would be replying to you in no time. He's a great chap to have around the forum, dispensing unlimited advice to all.Smile

The flashing of the koi is most likely due to the detected nitrites in your FG tank. This means that your filter system has yet to kick in and the good bugs have not been able to perform their task efficiently as yet. But you have done the right thing by changing water on a regular basis and also by adding salt.

However, you should not use table salt because it contains iodine ( in most cases anyway!) but instead you should use pond salt or sea salt. You should at this stage cut down on your feeding to just a little a day so that your filter will not be overloaded until it starts to mature.

Sorry, I am not an imperial measurement guy so 250gal should be around 1100 litres. To make a 0.1% salt solution, you will have to use 1kg of salt. If you like, you can increase the salinity to 0.3% on a gradual basis.

Continue to add the bacteria to aid in the filter maturation. Monitor the koi's behaviour and with a few more water changes and the salt and kicking-in of the filter, hopefully the flashing will be a thing of the past!Cool

If you can hold on to the arrival of the 2nd koi, it would be good until you get the filter running.

Are the rest of your fishes doing OK?

Good luck!

JohnsonSmile



colin00
Novice

Jun 19, 2002, 11:40 AM

Post #3 of 35 (91060 views)
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Re: [johnson lee] Nirite and Flashing problem [In reply to] Can't Post

Many thanks for answering.

3 things.

1. The salt I used contains no iodene. I checking on that. It's simpy saly plus an anti-caking agent that is not harmful.

2. The other fish all seem fine, but then goldfish are hardier than koi aren't they?

3. I got the conversion wrong and thought 100g was 1%! Doh! Will increase salt later!

They constantly want food, but are being fed a little once a day.

Col.

Cheers, Colin.


johnson lee
Veteran

Jun 19, 2002, 11:57 AM

Post #4 of 35 (91055 views)
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SmileHi Colin

Wow that was fast! Anyway, if the salt doesn't contain iodine, it should be OK.

Yes kois are hardier than gold fishes but I just wanted to check if your other fishes are OK too.

COntinue to check water quality regularly until filter improves/kicks-in.

Best of luck!

Johnson


colin00
Novice

Jun 19, 2002, 1:55 PM

Post #5 of 35 (91045 views)
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Re: [johnson lee] Nirite and Flashing problem [In reply to] Can't Post

OK, my good lady is at home today and I got her to go and mix the rest of the 1.5KG bag of salt in some of the water from the tank and pore it into the tank.

She says that within 20 mins the koi was flashing less and seemed far happier. She said it was like putting lotion onto sunburn (a good facimilie I guess).

So hopefully that'll help the fish until the nitrite is removed by the bacteria.

So thanks for helping me with my poor maths!



Col.

Cheers, Colin.


johnson lee
Veteran

Jun 20, 2002, 5:49 AM

Post #6 of 35 (91028 views)
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Hi Colin

Good to hear that your fishes are feeling better after adding the salt!Smile Anyway, it is good if you continue to test the water for ammonia and nitrites for a while until the filter has settled down.

Post the readings for us, OK?

Good luck, mate!Smile


colin00
Novice

Jun 20, 2002, 10:29 AM

Post #7 of 35 (91016 views)
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Thanks, and I will do.



When I got home last night it was....

PH=8

Am=0

Nitrite=0.3



So that's a slight improvement in the nitrite from it's worse point. Hopefully it will keep going down now. I did a further 20% water change.



Col.

Cheers, Colin.


johnson lee
Veteran

Jun 20, 2002, 10:47 AM

Post #8 of 35 (91015 views)
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Hi Colin

The nitrites is still a little high so you've got to keep a watch on that! Changing 20% water every alternate day would ensure that this is diluted.

If your fishes have stopped flashing, this is a good sign. The salt is a big help to help absorb some of the nitrites as well.

Best wishes!

JohnsonSmile


Lynne USA
User

Jun 22, 2002, 7:09 PM

Post #9 of 35 (90994 views)
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Re: [johnson lee] Nirite and Flashing problem [In reply to] Can't Post

Hi Colin,

Many times the anti cakeing agent is Yellow Prussiate of Soda and that can be harmful, it is also reffered to as YPS.

A cheaper way to purchase salt here in the U.S. is to buy Kosher salt at the grocery store or water softener salt but you would need to make sure it contains NO YPS.

Lynne


colin00
Novice

Jul 2, 2002, 10:20 AM

Post #10 of 35 (90961 views)
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Re: [Lynne USA] Nirite and Flashing problem [In reply to] Can't Post

Hi. No - the anti-caking stuff is not that and I took the packet to the local fish place and they said it was fine, although I've now got 'proper' salt from them that they had.

The readings for nitrite were up at about 0.4 again but the guys at the shop said, 'yes' change some water every other day, etc, but you need to let the filter mature, so don't go mad, the fish won't be hurt at that measure, just keep an eye on it.

I also got a new test kit from them to 'double-check' the tetra readings, and also because it includes nitrate, which I didn't have before, and obviously when this starts goign up, nitrite should be getting 'consumed' at a larger rate and should be coming down. So a few days later and the readings are this (on Sunday - will check again tonight)....



PH = 8

Am = 0

Nitrite = 0.3

Nitrate = 40



All the goldfish are fine and constantly hungry (I'll still only feeding a little), but Mutley (the koi) is looking better. He will come up to be tickled and especially to be fed. He prefers taking pellets from the finger to getting them himself! And he's flashing less. I think this is partly because of the salt, and partly because he's now used to the holding tank, etc.

I will continue to monitor and see how it goes.

We did pay for a tancho at a local koi place, but it died there. So I have credit to use for new fish when I want them, but am not thinking about that soon. Am also upset about the tancho dying as it was a nice fish. But then I guess it's better it happened there and not after I'd taken it away. The shop did all sorts of tests but could never track down the reason. Shame.

Cheers, Col.

Cheers, Colin.


johnson lee
Veteran

Jul 3, 2002, 6:07 AM

Post #11 of 35 (90942 views)
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Hi Colin

Good to hear that everything is under control and the nitrite is improving as well!Smile

I am glad to know that your koi is also improving and is flashing less now.Smile Yes, your dealer is right, take it easy, continue to monitor the nitrites and check on the fish. Once your filter settles down, your nitrite level will start to drop. Continue to change 20% water once every 2-3 days to ensure that the nitrites are diluted and won't harm your koi in the long run.

All the best!

JohnsonCool


colin00
Novice

Jul 3, 2002, 9:52 AM

Post #12 of 35 (90935 views)
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Thnaks for the reply.

Well last night we had some good news.

Tested again, PH still 8, Amonia still 0, nitrates had gone down slightly to 30 (which I don't really understand) but the important bit is that nitrites have finally gone down. On the new kit it was about 0.2-0.25. I wondered about the new test kit and double-checked with the tetra one I was using before. Yes, it''s certainly gone down.

So hopefully things are looking up (or down rather!)

Many thanks, Col.

Cheers, Colin.


johnson lee
Veteran

Jul 3, 2002, 11:11 AM

Post #13 of 35 (90930 views)
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Good for you, Colin!Smile

I'm pretty sure your kois are feeling much happier now and once the nitrites start to register 0, they'll be on seventh heaven!Cool

Best rgds

JohnsonSmile


Lynne USA
User

Jul 3, 2002, 6:31 PM

Post #14 of 35 (90918 views)
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HiColin,

I'm glad to hear you're getting the nitrites under control. I still think that if your buying your salt at a pet shop, your probably paying too much. Smile

Are there any koi dealers in your area? Having managed a pet shop for the better part of my life, I have found that it is better to buy from a koi dealer. Lynne


andyng_sy
Novice

Jul 4, 2002, 6:28 AM

Post #15 of 35 (90907 views)
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Re: [johnson lee] Nirite and Flashing problem [In reply to] Can't Post

Would like to know what brand is good and available over here in Malaysia for testing.

Andy Ng.


colin00
Novice

Jul 4, 2002, 10:11 AM

Post #16 of 35 (90898 views)
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Re: [Lynne USA] Nirite and Flashing problem [In reply to] Can't Post

Sorry for any misunderstanding but it's from a fish place. They have tropicals, etc, too, but are mainly a koi shop (many good examples from tiddlers up to some worth thousands of pounds).

Although they said the supermarket stuff I was using was fine because the anti-caking agent was sodium-somethingwithloadsandloadsoflettersicannotrememberthenameofrightnow rather than anything harmful I thought it better to use something from a fish place.

So no water change for 3 days now (will do a 20% tonight) and Mutley the koi seems very happy and is up at the surface demanding to be fed whenever we go into the garage (when the holding tank is). The goldfish always seemed happy and hungry!

The pond in the garden is coming on - bottom drains in and concrete base and half the concrete blocks for the sides are in and the space for the filter is being dug out and the other half of the garage has filters and vortexes and pumps, etc, in it (pictures at www.harrisc.demon.co.uk if anyone cares). So hopefully in the next couple of months he and some new friends will be happily swimming in their new 5000g (about 23-25 metric tonnes?) pond. It's been good weather-wise for a while so work was going well, but with the start of Wimbledon tennis it's started raining in the UK (this is an annual thing, tennis starts, rain starts) but today's nice, so hopefully things will start picking up again.

Cheers, Col.

Cheers, Colin.


Lynne USA
User

Jul 4, 2002, 10:11 PM

Post #17 of 35 (90884 views)
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Hi Colin, loved your website. You have made allot of progress on your pond, I can't wait to see the pictures when its done.


colin00
Novice

Jul 5, 2002, 12:45 AM

Post #18 of 35 (90882 views)
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Thanks. Even more done today! A load of equipment arrived today and when I cam home I was opening UVs and heaters and skimmers, etc! Smile

Even better news is that I tested again today and the nitrite is now down again. I did a 20% change and will leave things now until Sunday.

Today's results....

PH=8

Amonia=0

Nitrite=0.1

Nitrate=30



Col.

Cheers, Colin.


Arcen
User

Jul 5, 2002, 8:24 PM

Post #19 of 35 (90867 views)
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Smile Hi COLIN, I am also from the UK! My name is also Colin.You seem to not have filled in your user profile.Where abouts in UK are you from? I'm from HASTINGS,East Sussex.CHEERS.COLIN.......SmileSmileSmileSmileSmileSmileSmileSmile


johnson lee
Veteran

Jul 5, 2002, 9:05 PM

Post #20 of 35 (90865 views)
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Colin meets Colin! We have a few Johns on this forum as well!Wink

Anyway, Colin, good to hear that your nitrites reading is improving.

Johnson


colin00
Novice

Jul 8, 2002, 10:19 AM

Post #21 of 35 (90841 views)
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Sorry - I'll edit the profile. I'm in Lindfield West Sussex!



Col.

Cheers, Colin.


colin00
Novice

Jul 8, 2002, 10:24 AM

Post #22 of 35 (90840 views)
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The nitrites had all but disapeared. However, I'm worried about something. I have a couple of fish at koi places ready to come home when all's well, but I took some back from a neighbour over the weekened and amonia and nitrite both went up (0.2 ansd 0.4 respectively). I did a water change and will monitor closly, but will thsi happen every time, and will it only last a short time now the filter is working much better?

Thanks, Col.

Cheers, Colin.


SMW1
Veteran

Jul 8, 2002, 5:09 PM

Post #23 of 35 (90827 views)
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Hi Colin ,

Sorry I haven't replied sooner. I have been away for a while.

to be perfectly honest with you. A 250g tank should only contain a very small number of koi. I have read throgh this post form the start and it seems as though your filter although robably not yet fully matured is breeding nitrobactor and co (the good guys) quite efficiently now.

The fact that the ammonia level was 0 tells me that the filter is working. However the size of the filter and the tank that the goldfish and koi are kept in my not be able to cope with adding more koi so soon. I know its hard but it would be better to wait until your pond is ready until you buy more koi. Or the other option is to swap 2 goldfish for 1 koi. If I have read this post correctly you have 9 goldfish and 1 koi (mutly, does he do the same laugh ? Smile). To keep the levels or Nitrite down you will need to feed only once a day and feed a small quantities.

However I would reccomend that you wait. 250g of tank is not reall idea for koi and you could be tempting fate.

How long until your pond is complete ?.

Stuart


colin00
Novice

Jul 8, 2002, 5:23 PM

Post #24 of 35 (90825 views)
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Hi Stuart. We have 6 2" goldfish. We had 1 8-9" koi (Mutley, no the to laugh, but he's a bit of a mongrel!)Smile We also now have another 3 2-3" koi in there. I think adding any more would be a mistake. We have 2 7-8" koi waiting to come home from a local stockist (it was one - but they got another in and we've paid for that now too).

The current plan is......

When pond finished (about two weeks - would have been sooner but weather is slowing things down) Will add some media from FB tank and some bio-start stuff. Then after a few days take the 6 goldfish and add them to the pond. After a few weeks (however long it takes) when the filters are working ok and readings are good will add small koi. When settled down again - add Mutley. At that point move goldfish back to fg tank and then get new fish from stockist and keep them in fg tank for month to make sure they're okay.

The stockist is not actually saying, you must take these now, but he wants us to take them asap, althoguh I've now offered him money to feed them which helped a bit.

Does that sound okay?

I'm just worried that things went haywire as soon as these new fish were added. And wondered is filter wasn't as good as I thought, but it's been going for 45 days and as you say amonia was zero and nitrite had come down so the 2 main parts of the cycle were working and so a healthy crop of bacteria must have been in place. yes?

Many thanks, Col.

Cheers, Colin.


SMW1
Veteran

Jul 8, 2002, 6:17 PM

Post #25 of 35 (90821 views)
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Yu are correct in saying that the bacteria in the filte ris working. I'm just worried that you will over corwd this 250g tank with too many fish.

You also also correct about how to introduce the fish to your new pond. However I would fill and drain the pond once beofre any fish are introduced then I would monitor the water parameters very closly for he next two weeks. Its a shame I do not live close to you otherwise I would look after the koi for you.

Is sounds like you have everything under control.

Stuart


colin00
Novice

Jul 9, 2002, 12:39 AM

Post #26 of 35 (31786 views)
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Thanks for the offer, it would have been nice to have them well looked after until the pond was ready, but I'll just have to do my best for them in the less than perfect circumstances and make their temp home as good as I can.

Some good news and some bad tonight. Firstly, all fish seem well. They all seemed hungry too, but they only got a tiny bit of food. Amonia is back down to practically nothing. Somewhere between 0 and 0.25, but much closer to the 0 mark. However Nitrite has risen to 0.7. A further water change was done and I'll check again tomorrow. Hopefully the filter will cope over the next day or two.

Cheers, Col.

Cheers, Colin.


johnson lee
Veteran

Jul 9, 2002, 6:02 AM

Post #27 of 35 (31785 views)
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Hi Colin

Good to know that your pond will be completed soon! Yeah, Stuart is right, try not to over stock your FG tank because it will overload your filter capability.

From what I see, your filter is not fully matured yet. You are close to 0 ammonia which means the nitrobacter is present to break down the ammonia but nitrospira has yet to settle down and that is why you have high nitrite reading! This is where the less fish in the tank the better! You have done the right thing by changing water. Continue to change 20% or so water to further dilute the nitrites. You might also want to add 0.3% salt salinity to help absorb some of the nitrites! Monitor the fishes and ensure that they are not flashing or rubbing against the bottom.

Test water every 2-3 days and hopefully it will start to drop!

Rgds

Johnson


koifun
Veteran


Jul 11, 2002, 5:43 PM

Post #28 of 35 (31772 views)
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Re: [johnson lee] Nirite and Flashing problem [In reply to] Can't Post

Hi, Johnson,

Would u kindly educate me a bit on some terminologies in koi matter as I am rather new in koi keeping. Recently I encountered some nitrite problem in my pond and see many of our friends here mentioned about flashing problem in koi and I am not sure my koi have the same problem until one of my Kohakus died this morning. It was rather restless the last two days - symptom 1 : it swam speedily across the pond like mad fish and sometimes jump up and landed hard on the side of the pond whenever the pond light is switched on suddenly or someone passing by, causing a bit of stress to other kois in the pond ; Symptom 2 : its eyes were bulging like gold fish and lastly refuse to eat or surface up the pond.

Does the above mentioned considered flashing ? I have tested the pond for ammonia - 0 , nitrite - 0.5 ppm and pH 7.0 . I have added charcoal and larva stones into my filter compartment today to try to reduce nitrite. Do u think it will work? I also intend to add another small capacity filter to the pond using those blue round barrel of about 5 gallons in the hope that it will solve my problem of nitrite level. I am particularly interested to know whether how good is charcoal as an absorbent for the ammonium and nitrite if u have experienced it b4. I do this to save cost as activated charcoal is rather expensive in the long run.

Many thank for reading and your time.

Regards




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


    johnson lee
    Veteran

    Jul 12, 2002, 6:03 AM

    Post #29 of 35 (31761 views)
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    Re: [Koifun] Nirite and Flashing problem [In reply to] Can't Post

    Hi koifun

    I am so sorry to hear about the death of your kohaku!Frown Since you are rather new to koi keeping and also new to this forum, I need to ask a few questions to establish some parameters for us to help you, if you don't mind.Smile

    1. How long have you had your pond?

    2. How big is your pond? L x W x D

    3. How big is your filter? L x W x D

    4. How many kois are in your pond?

    5. What filter media do you use? Brushes? Japanese mats? Lava rocks? etc

    The reason we need to know all these is to ensure that we are able to dispense (hopefully) more accurate advice.

    Meanwhile, from your description of your fishes jumping and with bulging eyes etc, I can tell you that your fishes are not happy with the pond water!FrownCrazy

    You have tested for ammonia which is 0 and nitrites 0.5ppm and pH 7. When did you do the test? Morning? Evening? You might want to do 2 tests, once in the morning and once in the evening for comparison. This will give an indication whether your pH is fluctuating or not.

    Other than your kohaku, how many kois are showing the same symptoms of jumping? Flashing or flicking means your kois are rubbing themselves against the bottom or side of the pond. This means they are infected with parasites which are irritating them. The more often they flash, the more parasites are on their bodies. Any of your kois have raised scales like a pine cone? If so, together with the bulging eyes, it could be dropsy which is fatal to your kois. I am not scaring you but making you as informed as possible.

    I suggest you do an immediate change of water, up to 30-40%. This will dilute some of the toxins in there. Quickly give us the measurement of your pond in order for us to work out the amount of salt required to begin the most basic medicating process. You need to have 0.3% salt salinity to really kill off these nasty bugs.

    Charcoal is a good temporary measure for absorbing ammonia and/or nitrites but this is not a long term solution.

    Can you do the change of water first (remember to dechlorinate) and get back to us on the rest of the info we need? Hope your fishes are not getting any worse!

    Rgds

    Johnson


    dttk
    Veteran

    Jul 12, 2002, 7:15 AM

    Post #30 of 35 (31760 views)
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    Re: [Koifun] Nirite and Flashing problem [In reply to] Can't Post

    Hi, hope you don't mind me budging in...Smile. Johnson is right, we need more info. How are the other koi behaving? Your pH is borderline low. This pH will not promote growth of good bugs. Best to raise it by adding baking soda. Add 50g of baking soda to 1 ton or 1000L of water. Check the pH the next day. Try to raise it to between 7.5 to 8.0. The good bugs will thrive in this pH and your filter will work better and nitrite will disappear. I do not have any experience with charcoal but I would not use it to reduce nitrite. As Johnson mentioned, better to add salt to make 0.3% salinity, reduce feeding, raise pH and ensure that filter is working properly. Sorry to hear about the dead koi. If the others are behaving normal, just sit back, relax and observe the koi. Smile
    Always friendly :)


    koifun
    Veteran


    Jul 12, 2002, 6:48 PM

    Post #31 of 35 (31746 views)
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    Re: [johnson lee] Nirite and Flashing problem [In reply to] Can't Post

    Many thanks for your response and that of Dr. Tan

    Currently I have about 4 x 30 cm , 6x 20cm and about 15 below 15 cm and my pond is FG 8' x 4' x 2.5' filling up to 2.3' water level. My pump rate is about 2500 - 3000 L / h as quoted by manufacturer. This morning I checked the quality again and it was NH4+ 0, N02- 0.1 ppm and the water is cleared up and the koi seem happpier after the death of the new stress kohakus. I have set up an additional filtration system now but there is no media in it yet - just circulating the water. The water is crystal clear now.

    The existing filteration system comprises bioball, Jap mat and charcoal in the first compartment. Second compartment consist of coral, chips, clay ball and newly added larva stone and green mat while third consist also coral, clay ball, jap mat and the last compartment is filled with charcoal and calcium ball I think.

    The pump spongy filter at the submergsible tend to get pluck up very fast due to large amount of muddy sediment every time I notice the water flow slow down. I am not surprise u will say my pond is overcrowded and I do realise it. I am starting to give away those not so nice ones to reduce the stock level.

    I think Dr. Tan is right to think that my pH is a bit low and baking powder may solve my problem. Any idea where can I get this baking powder ? Can I get those from supermarket or sundry shop which meant for cake making? I think most of the items if sold in pet shop are very expensive like rock salt - I could get 30 - 40 cents per kg from sundry shop but fish shop will sell from $1.00 to $3.00. Is there any different - the salt from sundry shop and fish shop?

    I am not sure my kohaku died of internal injury or water condition as other fishes are ok. Prior to its death, it had been very rough in the pond that it kept banging onto the pond side with great impact - I saw it almost fainted at one stage after impact.

    Any way , all seem very peaceful now and the koi are very happy once again.

    Thanks again for the advice.Sly




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


    dttk
    Veteran

    Jul 13, 2002, 7:03 AM

    Post #32 of 35 (31739 views)
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    Re: [Koifun] Nirite and Flashing problem [In reply to] Can't Post

    Koifun Smile, good to know that your water is clear and the other koi behaving normally. Baking soda is Sodium Bicarbonate. Baking Powder is not. So don't get baking powder. Baking soda is cheaply available at shops that supply to Bakeries. Over here in PJ, I get mine at RM7 per 2kg. Your tank volume is 8ft x 4ft x 2.25ft = 72cu.ft = 2,038L or 2 tons. Add 50g x 2 or 100g slowly so as not to frighten the koi. Check the pH the next day. If it has reached 7.5, no need to add any more. Reduce feeding to half. Check water for nitrite after few days. It should not be detectable. Inspite of having coral chips in the filter, I do not understand why your pH is 7, unless there is alot of debris in the filter. Your filter media arrangement is not very ideal. Remove the sponge from your submerged pump as it will clog up easily. Having a dirty sponge in the tank is also not good for koi. Have brushes in the 1st compartment to trap solids. Bioballs in 2nd compartment. Jap mats in 3rd compartment. Coral chips or shells in 4th compartment. No need for charcoal anymore. Rock salt from sundry shops are just as good as those from fish shops and yes, you're right.....cheaper too....Wink
    Always friendly :)


    koifun
    Veteran


    Jul 13, 2002, 4:47 PM

    Post #33 of 35 (31731 views)
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    Re: [dttk] Nirite and Flashing problem [In reply to] Can't Post

    Hi, Doc

    Thanks for your advice.

    As for the sponge in the pump, wouldn't u agree that it actually prefilter off the dirts which will otherwise be found in the filtration system increase the frequency of having to clean up the filtration chamber. Would appreciate u can enlighten me the benefit of removing it as it is part of the submergsible pump which serve the purpose mentioned.

    Honestly i found it beneficial as it also prevent the pump from being choked up if the dirt were to block off the centrifugal compartment of the pump. This has happened to my previous pump b4 which has no prefilter sponge.

    Good niteCoolCoolCool




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


    dttk
    Veteran

    Jul 14, 2002, 5:05 AM

    Post #34 of 35 (31720 views)
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    Re: [Koifun] Nirite and Flashing problem [In reply to] Can't Post

    Koifun Smile, it's really a matter of preference abt where you want to place the "pre-filter" sponge. If you feel that it is convenient for you to have it there, by all means do so...Smile. I personally would not like to keep something that accumulates waste within reach of the koi. Your 1st chamber itself could act as a "pre-biofilter". That's why I suggested brushes in there. The pump in the tank would of course be subjected to blockage by ? leaves or ? sandy particles which get stuck onto the plastic grid, but usually not by waste. So it would require cleaning too once in awhile. As it is, using a submerged pump would break up the waste into finer particles which would contaminate the water. Imagine if the air we're breathing in consist of fine waste particles...Unimpressed. Having a sponge there to trap the waste and exposing it to the koi which will mess it up is worst...Mad. That's why waste should not be within the koi's reach if possible. ...oopps...what am I talking about...Shocked. I think I talked too much already. Have a great Sunday...Wink.
    Always friendly :)


    johnson lee
    Veteran

    Jul 15, 2002, 6:06 AM

    Post #35 of 35 (31709 views)
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    Re: [Koifun] Nirite and Flashing problem [In reply to] Can't Post

    Hi

    Glad to know that your water is clear and the kois are doing well!Smile However, I would advise you to continue regular checks of your water until you are fairly confident that the water quality has stabilised.

    Take dr tan's advice on re-arranging the filter. Always have brushes in 1st chamber to trap solids.

    I wish you all the best!

    JohnsonSmile

     
     



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