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DIY Nitrate Filter

This is a discussion on DIY Nitrate Filter within the DIY Aquarium forums, part of the TFK Resources category; --> Not really happy with the filter floss in the secondary canister, I got some AC70 foam (which fits really well) and re-setup the filter....

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Old 04-10-2012, 08:03 PM   #91
 
Not really happy with the filter floss in the secondary canister, I got some AC70 foam (which fits really well) and re-setup the filter.
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Old 04-17-2012, 09:41 PM   #92
 
Just a quick update. Although the filter seems to be handling ammonia and nitrites fine, there is no evidence that it is processing nitrates. I added a valve and have reduced the flow through the chambers.
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Old 04-17-2012, 10:05 PM   #93
 
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Unfortunately life has been busy lately preventing my incessant foruming I'm happy to see you have not given up on the nitrate filter AD! Keep up the good fight hehe

Anywhoo which filter isn't showing a difference; the floss filter the matrix filter or did you mean the whole thing isn't reducing nitrates? That's sad but I'm not really surprised unfortunately. I'm still battling heater issues at the moment. Someday...
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Old 04-18-2012, 07:32 AM   #94
 
Actually Beetle, the second canister is mostly sponge (same type as in my AC70 filter) it just has 1" or so of polyester filter floss at the top (you missed the change). The water runs through the matrix/de*nitrate canister first, then right through the sponge filter. My thinking here was to have the bacteria in the first canister have first crack at any dissolved organics (food) and then polish it off in the second canister. Although one might visualize that at some point, the second canister may contain beneficial bacteria as well.
The effluent that I check is the water returning to the tank (which has gone through both canisters).
According to Seachem, I should have seen lower nitrate results by now. But after adding the additional fish (large fry), the nitrates climbed to the point that I used FNR again to bring them down some.
I've used plenty of Stability.
If slowing the flow rate doesn't produce results (given some more time) I'm uncertain what the next steps will be.

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Old 04-18-2012, 09:05 AM   #95
 
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well thats certainly frustrating, and bassackwards from what I had expected weeks and weeks ago when you announced that you were building this filter. From the reading i had done (especially the stuff about lava rocks) I figured by now the nitrates would be gone, and in their place would be a black hole sucking in fish, gravel, and time. But no such luck. Ill get back to the books, hopefully I will be able to figure out not only how to make it work, but why it didnt in the first place. Im no rocket whiz, but I have a hard time understanding why that filter isnt producing H2S in WMD quantities.
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Old 04-18-2012, 04:54 PM   #96
 
Well Beetle, before you went all spacial, I was just looking to create nitrate eating nano bots! I haven't given up yet, but clearly the road to zero nitrates is not a super highway, but more like a back country loggin road in a beat up pickup!

I was doing some research on the Seachem forum and came across a fella that used a ton of product and just when he had all but given up, it started working for him.
I think the development of anaerobic bacteria, especially in the matrix/de*nitrate media is a very slow process...much slower than the Seachem folks suggest.
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Old 04-21-2012, 08:28 AM   #97
 
I went back to the Seachem discussion forum to recap this project and ask for advice.
(About 8 weeks into this now and I was expecting to see some results before now).
They advised that I had plenty of product, the reduction in flow was likely good to promote anaerobic bacteria development, and that at this point, I just need to wait for the bacteria to develop enough to handle the bio-load.
So...on it goes.
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Old 04-24-2012, 08:25 AM   #98
 
Quote:
Originally Posted by skelator View Post
where did you find that type of sponge material that you are using?
It's the standard sponge for an Aquaclear 70 filter.
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Old 04-24-2012, 08:39 AM   #99
 
where did you find that type of sponge material that you are using?
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Old 04-24-2012, 07:21 PM   #100
 
i made another setup today. this one is a 4"X2' piece of pvc. i think im gonna fill it with matrix and de-nitrate. i may fill one tube with one and one with the other. my first tube is 3'x2'.

i would think this should absolutly work the flow would befinatly be under the 50gph that they reccomend.
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