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  1. #1
    Extreme Koi Member Rank = Adult Champion NickK-UK's Avatar
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    Zeolite - do many people use this outside of showers?

    I've put a bag of zeolite in the filter to combat the autumn nitrogen spike as the biological filtration slows with dropping temperatures.

    I've also added some clay too.

    I'll test the water parameters later but it's been in there since Saturday so we'll see if the nominal amounts I normally have disappear.


    14000l, my mutts: 2010 Chargoi, 2022 Doitsui/Tancho/Kujaku/Hi Utusri, 2023 Agasi/Doitsui

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  3. #2
    Senior Member Rank = Jussai Djstiles999's Avatar
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    I thought Zeolite absorbed ammonia rather than nitrates?
    13,243 gallons, Filtreau HF30’s K1 capacity of 1,400l, Bakki Shower, BHM and understanding wife

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  5. #3
    Senior Member Rank = Adult Champion Alburglar's Avatar
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    Nitrogen cycle.
    Remove ammonia then it won't be broken down to nitrites then nitrates
    2660 Gallons. 4" Bottom Drain and Skimmer. Draco Solum 16 Drum. Anoxic Filtration. Air lift returns.

  6. #4
    Senior Member Rank = Jussai Djstiles999's Avatar
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    Ah that makes sense, should’ve turned my brain on
    13,243 gallons, Filtreau HF30’s K1 capacity of 1,400l, Bakki Shower, BHM and understanding wife

  7. #5
    Yes, that's correct, zeolite will reduce a nitrite spike by adsorbing the ammonia that the ammonia bugs (nitrobacter) use to convert it to nitrite but zeolite shouldn't be necessary over winter because the filter bugs don't die, they become less and less active at a rate that matches the rate at which the fish appetite, and therefore their ammonia output decreases.
    Last edited by Manky Sanke; 25-09-2024 at 02:41 PM.

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