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Thread: DIY "Anoxic Filtration System" eliminates nitrates? Anyone tried this?

  1. #706
    Registered Member Blobfish's Avatar
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    Default Re: DIY "Anoxic Filtration System" eliminates nitrates? Anyone tried this?

    glad you mentioned that Jack L....was looking into the poret

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    Default Re: DIY "Anoxic Filtration System" eliminates nitrates? Anyone tried this?

    Hello all,

    I wanted to post an update on my 75 gallon aquarium. I have in it about 40 tetras, and several dwarf cichlids, about 10. This is my experimental tank, it is heavily planted with a soil substrate. It has cat litter under that and a layer of laterite under that. I setup a plenum underneath with bio balls, but I have no active water flow under that. The last water change was on the 5th of May and I decided that today I would do another water change. I figured I should test for Nitrates out of curiosity, and I got a reading of 0. The tank is filtered with a sump that now holds 14 BCBs. Only 10 of these are mature as I added the last four about 12 days ago. Originally (when I last posted on this thread) I only had 5 BCBs. These five could not keep the Nitrate levels at 0 for longer than 1 week and I had algae problems in the tank. The algae disappeared a month after adding 6 a few months ago. Encouraged by these results I added the last four. It would be a tight squeeze to try and add anymore. So the good news is that I have achieved the goal of 0 nitrates even after months of no water changes. The fish are in good health with great colors and healthy appetites.

    CÚsar
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    Last edited by Tindomul; 08-09-2019 at 05:48 PM.

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    Default Re: DIY "Anoxic Filtration System" eliminates nitrates? Anyone tried this?

    Quote Originally Posted by Tindomul View Post
    Hello all,

    I wanted to post an update on my 75 gallon aquarium. I have in it about 40 tetras, and several dwarf cichlids, about 10. This is my experimental tank, it is heavily planted with a soil substrate. It has cat litter under that and a layer of laterite under that. I setup a plenum underneath with bio balls, but I have no active water flow under that. The last water change was on the 5th of May and I decided that today I would do another water change. I figured I should test for Nitrates out of curiosity, and I got a reading of 0. The tank is filtered with a sump that now holds 14 BCBs. Only 10 of these are mature as I added the last four about 12 days ago. Originally (when I last posted on this thread) I only had 5 BCBs. These five could not keep the Nitrate levels at 0 for longer than 1 week and I had algae problems in the tank. The algae disappeared a month after adding 6 a few months ago. Encouraged by these results I added the last four. It would be a tight squeeze to try and add anymore. So the good news is that I have achieved the goal of 0 nitrates even after months of no water changes. The fish are in good health with great colors and healthy appetites.

    CÚsar
    wow, awesome. Maybe this was in a previous post but were you able to collect data to try to see what the plants versus the BCBs was contributing to the nitrate levels?

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    Default Re: DIY "Anoxic Filtration System" eliminates nitrates? Anyone tried this?

    The plants in the tank have been the same plants for over a year with lack luster growth. In my data before the addition of the extra BCB's I was getting a red color for the nitrate tests and was forced to do water changes 1-2 times monthly. I had a hard time distinguishing between 40ppm and 80ppm.

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    Default Re: DIY "Anoxic Filtration System" eliminates nitrates? Anyone tried this?

    This is an interesting subject. It's verging on old techniques for marine tanks, plenum etc.

    I am terrified of any anaerobic nitrate filters in aquariums, very hard stuff to control and when it goes wrong, it goes really wrong.

    The marine guys have played lots with carbon dosing (vodca, sugar, vinegar or other). Im not sure how this relates to FW. Also algae scrubbers were a thing for a while.

    I'm still of the opinion that nitrates are not the only thing than retards discus growth, there's something else there too IMO - Growth suppressing hormones etc. I don't think it's well understood.

    I would like to see someone grow out some discus with one of these filters and minimal water exchanges, If you could crack it, it could revolutionise the way people grow little discus. Again, my gut says more would be required than just 0 nitrates. Perhaps lots or activated carbon or Ozone to adsorb / denature the unknown elements that ruin small discus. Just thoughts.

    Great thread (not that I read it all) very interesting stuff.
    My tank - http://forum.simplydiscus.com/showthread.php?135251-coopers-6x2x2&highlight=

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    Registered Member bluelagoon's Avatar
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    Default Re: DIY "Anoxic Filtration System" eliminates nitrates? Anyone tried this?

    Quote Originally Posted by cooper666 View Post
    This is an interesting subject. It's verging on old techniques for marine tanks, plenum etc.

    I am terrified of any anaerobic nitrate filters in aquariums, very hard stuff to control and when it goes wrong, it goes really wrong.

    The marine guys have played lots with carbon dosing (vodca, sugar, vinegar or other). Im not sure how this relates to FW. Also algae scrubbers were a thing for a while.

    I'm still of the opinion that nitrates are not the only thing than retards discus growth, there's something else there too IMO - Growth suppressing hormones etc. I don't think it's well understood.

    I would like to see someone grow out some discus with one of these filters and minimal water exchanges, If you could crack it, it could revolutionise the way people grow little discus. Again, my gut says more would be required than just 0 nitrates. Perhaps lots or activated carbon or Ozone to adsorb / denature the unknown elements that ruin small discus. Just thoughts.

    Great thread (not that I read it all) very interesting stuff.
    There are other things that retart growth. Nitrates are the indicator for a WC.. If that is kept low so are the other things that retart growth such as bad bacteria, urine, DOC/TDS just a few.

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