bigjoe200325 Posted March 3, 2022 Share Posted March 3, 2022 I have a 75 gallon freshwater planted tank with corries, snails, glofish tetras, and Colombian tetras. Here are my parameters; Ammonia 0, Nitrite 0, Nitrate 20, PH 6.4, GH 300, and KH is 0. I’m trying to get my KH up to a normal level, PH up to a more neutral level without raising the GH more than it already is. I don’t like using chemicals, I’m more interested in doing it naturally and safely. I was told to use crushed coral in my filter, but I don’t know how to go about doing that and I looked at crushed coral on several sites but I don’t know how much to add and some have aragonite in it. Please help me with this information and I want to thank you in advance for your help. Link to comment Share on other sites More sharing options...
colo3000 Posted March 3, 2022 Share Posted March 3, 2022 (edited) Both crushed coral and aragonite are forms of Calcium Carbonate. I have crushed coral in a filter media bag in my HOB filter. I would avoid the very fine grain aragonite if you're looking to put it in a filter media bag. The amount you add is more up to the space you have in your filter if you're using a HOB, I have a small bag that holds about a half cup to a cup of crushed coral if I had to guess, for my 29 gallon. Edited March 3, 2022 by colo3000 1 Link to comment Share on other sites More sharing options...
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