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Home: KOI Talk: Pond Construction & Water Filtering System:
High Nitrates Level? Try This!

 





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chiamlh
Koi Lover

Jul 19, 2000, 2:00 AM

Post #51 of 312 (39440 views)
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Hi Khoobg!

I don't know what si Bio-Balls ??

Can explain please.. Where I can buy it at kl or selangor ???

What his look like?

thanks!


Khoobg
Webmaster


Jul 19, 2000, 5:45 AM

Post #52 of 312 (39441 views)
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Hello chiamlh,

The following show five pcs of bio balls



The following is the container that hold bio balls in the DIY trickle filter.



Bio balls should be available in most of the koi dealers' shop or farm in KL.


dttk
Senior Member

Jul 19, 2000, 11:35 PM

Post #53 of 312 (39441 views)
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Dear Mr BScottGould, perhaps Mr Khoobg's trickle tower has air inlets right below the tray to allow for air entry. Would you like to elaborate more on that Mr Khoobg? Cheers!


Khoobg
Webmaster


Jul 19, 2000, 11:50 PM

Post #54 of 312 (39441 views)
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Quite a number of small holes were drilled on the side wall of the tray. Allowing air flowing into the containers.


Khoobg
Webmaster


Jul 23, 2000, 10:04 AM

Post #55 of 312 (39438 views)
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Pic of trickle filter email to us by Marcus.



rahim
Koi Lover

Jul 24, 2000, 12:49 PM

Post #56 of 312 (39441 views)
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Hi everyone,

I went to Zen Watergarden in Taman Desa last Saturday. I saw a very nice trickle filter made of huge PVC pipe. I think the PVC pipe diameter is about 10 inches. They use bioballs as the filter medium. Very nice design as it doesn't potruding near koi pond.

Hope the people in Zen can reply because I cannot find anyone around to ask wether it is for sale.

Thanks


Khoobg
Webmaster


Jul 24, 2000, 2:16 PM

Post #57 of 312 (39440 views)
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Hi Rahim,

You can get Hans Ham to do one for you as he has made several units for several pond owners. Or you can do one yourself using 12" PVC pipe.

We have infacted mentioned it earlier in the following thread http://www.koi.com.my/ubb/Forum4/HTML/000026.html


Anonymous
Anonymous

Jul 31, 2000, 12:16 AM

Post #58 of 312 (39439 views)
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Hi everyone. First of all, as an employee at a pet store which deals alot with ponds, it's nice to see that more people have become aware of the benefits of wet/dry biological filtration. While I do not maintain a garden/ornamental pond, I am very active in the aquarium hobby. I just recently joined a website pertaining to marine aquariums. This topic showed great interest to me in that many aquarists are now doing away with trickle filters. I noticed in Mark's drawing that he had those mats where algae could accumulate and consume NO3. I would be anxious to see the results of their removal. I thought maybe you guys would like to know why my fellow aquarists no longer use this method. The fact is that it is too efficient. Nitrate production is too fast for us to keep after it, so now deep sand beds (4-5") are used to create the anoxic zones for denitrifying bacteria. I know aquariums and ponds, though similar in many ways, have many different factors that contribute to them. Anyway, if nothing more than a biotower is used in these filters, how does the denitrification take place?


Mark
Koi Kichi

Aug 1, 2000, 11:25 AM

Post #59 of 312 (39440 views)
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Hi
Keeping aquarium fish is very different from keeping koi. Japanese synthetic blue/green mats are used to build good bacteria. They are not meant to trap algae. My 2 filters now operate without the mats and they have been operating for more than 2 months now. The water parameters taken once weekly constantly report pH 7.5, ammonia and nitrites zero and nitrates never exit 10ppm.

In a wet system, the rate of nitrates production are dependent upon the effectiveness of the bio bugs in those mats. Nitrates is the end product of nitrites. If koi are over fed, more ammonia will be produced and hence more nitrates is produced by the nitrites. So nitrates builds up and sometimes could reach as high as 300ppm. So far, there is no known economical way of removing these nitrates besides the introduction of a trickle system. It is an old trick and proven by many hobbyists for its effectiveness in stripping nitrites from the water that passes thro' it. This may be bad news to your sales of your small filter systems 'cos a trickle system is very easy to build. I built mine for less than a S$100 to handle my 1200 gallon pond. It is never a dying thing so to say.

Hope this help.


Khoobg
Webmaster


Aug 1, 2000, 11:37 AM

Post #60 of 312 (39441 views)
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Hi FishBait,

Welcome to the forum.

Using sand bed to achieve anoxic condition may be suitable for aquarium but it is definitely not practical for koi pond. In most ponds, we have bottom drains. Anyway, like Mark has mentioned, trickle filter is extremely effective, cheap and almost maintenance free and there is no reason for us to do away with it.


rahim
Koi Lover

Aug 9, 2000, 6:19 AM

Post #61 of 312 (39439 views)
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Hi Khoobg,

I just bought two 8" diameter PVC pipe about 8 ft long. I have some free time through this two weeks and thinking about building a trickle tower to solve my green pond problem.
the idea is to imitate the Zen watergarden trickle filter model.

Anyway, what is the average price of one bioball pictured above?

Thanks


Khoobg
Webmaster


Aug 9, 2000, 7:36 AM

Post #62 of 312 (39440 views)
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Rahim,

I am not sure on the latest price of bioball but I used to buy mine at RM 0.10 ~ RM 0.11 per pc.



rahim
Koi Lover

Aug 10, 2000, 3:15 AM

Post #63 of 312 (39440 views)
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Hi Khoobg,

Went to aquarium shop in Seremban today. The bioballs pictured above is about 15 cent each and I bought different type which is rounder and cost about 25 cent each.

thanks


Khoobg
Webmaster


Aug 10, 2000, 3:46 AM

Post #64 of 312 (39440 views)
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Rahim,

Thanks for letting us know. The infaltion factor come into play. In KL, I think it will be cheaper. If you ever come to KL, you can try to go to Kian Weng in Sungai Buloh Industrial Area where prices should be lower.



rahim
Koi Lover

Aug 18, 2000, 12:59 AM

Post #65 of 312 (39441 views)
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Hi Khoobg,

I went to Syarikat Atari in Taman Desa KL last Tuesday. Met the owner Mr. Robert and bought 300 more bioballs. The price there is about 13 cents. Same with the one I bought in Seremban which cost me 25 cents each.

My trickle tower is running today. Seven feet tall of 8 inches diameter PVC pipe and two stages. First stage, 200 bioballs and second stage has 300 bioballs.

Hope to see the effectiveness soon.

Thanks


Khoobg
Webmaster


Aug 18, 2000, 11:23 AM

Post #66 of 312 (39440 views)
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Good to know that you get cheaper bio ball from Robert Gan.

By the way, it will nice if you can post your nitrate reading before and after running trickle tower for the benefits of all here.

Also kindly post the cost your building your trickle.

Thanks in advance.


Marcus
Koi Lover

Aug 21, 2000, 1:21 AM

Post #67 of 312 (39440 views)
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Dear all,

after so many weeks of testing my trickle tower, I finally realise that mine tower is not working! I tested the nitrate level and it is consistantly very high...>100mg/l(ppm)
!!!

However, after installing my trickle tower, my water has been perfectly crystal clear. I do not know what is the reason that my trickle tower is not working. Any advice will be appreciated.

Here are my design specifications:
(Top to bottom)
1) drip tray
2) bio-balls
3) lava rocks
4) 1 layer of fiter mat

As shown in the picture above, I have holes drilled on the container below the drip tray. I have added more than what the picture shows.

My pond is relatively lowly stocked. I have about 0.24% of salt concentration in the water. Could this be a reason? If not, can any one see any problems with my trickle tower???

Thanks



Khoobg
Webmaster


Aug 21, 2000, 7:38 AM

Post #68 of 312 (39440 views)
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Marcus,

Is the water flow rate through your trickle too fast ? I have mentioned earlier that flow rate does have some effect on the efficiency of my trickle and low flow rate tend to have better result. Mark has also confirmed that in the other thread. Hence please check and reduce the flow rate through the trickle.


Mark
Koi Kichi

Aug 21, 2000, 1:13 PM

Post #69 of 312 (39441 views)
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I have added the following information in the up post dated 08-06-2000 (Page 1 of this topic):
Quote
Something New added (dated 20th Aug 2000) - More findings since I last post on this system 3 months ago. I added more info into this particular post so that those who come here will not be mislead by my earlier reports.

About the media - Bioballs has provened itself to be the best as compared to synthetic Japanese matings(SJM), cremaic rings and hair curls. There is absolutely zero maintenance required in bioballs. The worst being SJM which consistently give up a foul smell coupled with lots of insects flying at the opening of the filter system.

About the height/depth - My observation show that if water is made to travel through a distance(height of bioballs) of 18 inches or more, the results are good as compared to those that are less than 18 inches. Anything that is less than a foot is a waste of effort.

About the flow rate - I must apology for the wrong information given in the up post. My 3 months observations showed that a slower water flow rate gives good results as compared to a higher flow.

My recommendation - For long term use only bioballs as trickle media. (For short term, any types of media works.) Although a slower pump works better, use a pump that will circulates 1.5 to 2 times per hours of your total volume of water.

Regards.
More changes are made to one of my existing filter box. This round it is a completely wet/dry system. Notice also the heavy brush are moved out. Please note that the cost of the bioballs compared to SJM is much much more higher. Cheers!


(This post was edited by Mark Richman on Oct 8, 2001, 2:00 PM)


David C H Ngie
Koi Lover

Aug 21, 2000, 2:12 PM

Post #70 of 312 (39441 views)
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Hi,Mark
I come across a patented spare part for Bioball Trickle filter in Sydney.St George Aquarium,Kogarah.It is Like a Ballbearing "T" connector,it enhance what you have design for the "drill hole pipe"at the the last chamber.The idea is to attach drill hole pipe(with one end corked)to both end of the connector.It work like a propeller when water flows through then carry maximum oxygenated water showering to the bioball below to create a better ecosystem for the bacteria breeding environment.
I have the photo posted to Mr Khoo to help me post to the forum for further study.

Regards.


Khoobg
Webmaster


Aug 21, 2000, 10:20 PM

Post #71 of 312 (39441 views)
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Picture by David.










David C H Ngie
Koi Lover

Aug 23, 2000, 6:12 AM

Post #72 of 312 (39441 views)
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Thankyou for Mr Khoo for putting up the Photo,however the filter is not under this topic instead of "Foundation".This the straight flow system that cater for a much slower water cycle proposed by Mr Izeki.


Eric Lim
Koi Lover


Aug 25, 2000, 12:54 AM

Post #73 of 312 (39440 views)
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Hi! Mark,

Thanks for all these very informative infor. Really hope to have more people like you & Dr. Conrad around this hobby circle.

My present trinkle tower & filter (1.5ton)had passed the 1 mth. period (still new to tell), with clear water since Hans Ham came to help me built it. In the past, after 3 wks. of water changing - our pond will turn green (can't see the kois). So looks like we'd hit the nail by the head. Only after 2mths. will I considered it successful. Water parameter are all OK. Our stock are considered high - 38pcs. in 4 tons pond + 1.5 tons filter.

Two points you stated I'll like to endose;
1. The drop points are 1 foot away on 2nd & 3rd trays.
2. We used bio-balls.
3. This I think is important - we took the inlet at the last compartment of the filter system.
4. We cut opening to enable foul gas / air to exchange freely.

FYI - Tan Beng Teck had took some photos of this filter system & had suggested to me to write an article on this at Cyberfins.
I'll do it, with support from my good friend Hans. Wink

Rdgs,
Eric
SKC member

(This post was edited by Eric Lim on Dec 8, 2001, 3:00 PM)


Mark
Koi Kichi

Aug 26, 2000, 6:58 AM

Post #74 of 312 (39441 views)
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More picture bioballs.



(Thanks Mr Khoobg for putting up the picture).

The round bioball on the left cost 40 cents each and the one on the right is 10 cents each.

(This post was edited by Mark Richman on Jan 8, 2002, 3:00 PM)


jtang
Koi Lover

Oct 4, 2000, 3:13 PM

Post #75 of 312 (39441 views)
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Does anybody know where I can find a cheap place to purchase bio-ball. I found two places but they want too much for it.

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