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Biological filtration

Discussion in 'Off Topic and Chat' started by Sourpuss, Dec 7, 2017.

  1. Sourpuss

    Sourpuss Member

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    Hello all!

    I need to get some new bio filtration for my fluval 306. The fluval medium that I used last time seemed to really hold on to nitrates. What do you all run in your canister filters? I was going to use lava rock because I have it on hand. Rethinking that one.
     
  2. ForTheHalibut

    ForTheHalibut Member

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    Can you please clarify what you mean by "hold on to nitrates"?
     
  3. Sourpuss

    Sourpuss Member

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    I bought all new filter pads,cleaned the filter. Then I set it up on a bare bottom tank. Nitrates were .25. When I took it off the other tank it was .30 ish. IIRC?!
     
  4. Sourpuss

    Sourpuss Member

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    Forgot to add that I replaced half of the media. They were very old and some were almost black. I need something i can clean easier. Something more reuseable.
     
  5. Phishless

    Phishless Lifetime Member
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    .25 or .30 is next to nothing, what kit measures so low???

    In order of efficiency my media choices would be Poret Foam, 3/8" pumice, and then lava rock(small pieces)

    I often struggle to keep NO3 & PO4 up to my mark @ 20:2ppm respectively.
     
  6. Sourpuss

    Sourpuss Member

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    Duh, sorry 30ppm and 25 ppm.
     
  7. ForTheHalibut

    ForTheHalibut Member

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    Biological filtration provides a home for bacteria that will convert ammonia (bad) and nitrite (bad) into nitrate (substantially less bad). Biological filtration serves to create, not remove, nitrate. Nitrate is only removed from an aquarium by water changes, plant growth, and special chemical additives.
     
  8. Phishless

    Phishless Lifetime Member
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    And what is wrong with 25-30ppm, I wish I could keep mine that high.
    Do you have enough plant load to use this up???

    I seem to remember you stated all tanks are lo-tech.
    Once CO2 is introduced macro ferts are hard to keep in the water column.
    Sorry I'm not much help with lo-tech arrangements.
     
  9. Sourpuss

    Sourpuss Member

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    This is when I had no plants except 2 floating anubias. They were with orandas. High bioload no plants to speak of. I usually kept them in less than 20ppm. 80% water changes per week. A totally different way to keep an aquarium. Lots of Goldie keepers feed very heavy. Many keep sparse tanks. So we water change a lot. I never removed algae. This is free fish food for goldfish. This planted tank side is a very different world. I hope I can figure it out.
     
  10. Sourpuss

    Sourpuss Member

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    Phishless,

    Do you get your pumice from a garden center of landscaper?
     
  11. Phishless

    Phishless Lifetime Member
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    I went "Phishless" almost!
    Recently added some Cory's only to keep the substrate stirred up.
    They do their job and keep debris from settling in one place for me.

    Regarding pumice which is about the same as Seachem Matrix without the price tag.
    Ebay search for 3/8 or so pumice, maybe $15US for like 2 pounds???
     
  12. ForTheHalibut

    ForTheHalibut Member

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    I would like to reiterate that no matter how much media (pumice or otherwise) you add to your tank, nitrates will not be reduced. Biological filtration only reduces ammonia and nitrite. Nitrate can only be reduced with water changes, plants and chemical additives.

    Am I missing something in the conversation here?
     
  13. Sourpuss

    Sourpuss Member

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    I did full 80% water changes and nitrates would not go below 20 ppm. So either i had a bad test kit or my media went bad somehow. At any rate i would like something that does not clog and is easy to clean. Maybe I should try bio balls without the little sponges in them. Then I could just clean half them in h202 and replace them. How often do you have to replace pumice?
     
  14. Phishless

    Phishless Lifetime Member
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    Not missing anything!:D
    I was just suggesting other media.
    WC's and or a lot of plants are about the only way.

    Ceramic, pumice, Poret foam etc... will all need to be cleaned @ some point.
    Cleaning half at a time is a good idea, I use a heavy dose of glute to clean foam and ceramic.

    De-nitrification will not happen with any of this media.
    NO3 will still be an issue if the plants don't uptake.
    API test kit? If so bottle #2 needs to really be shaken up!
     
  15. Sourpuss

    Sourpuss Member

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    Yes, the infamous api nitrate reagent. Shake it till your arm falls off, then pick it up with the other one and do it again. Does the pumice clean up nice?
     
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