The main ingredient in AS is not peat its clay. I believe there is peat in the powersand. Is that what you are refering to? Aquasoil will lower your KH. I believe IBN (Eric) has said out of tap his KH is 9 and the aquasoil/powersand lowers it to about 2. Correct me if I am wrong Eric. With that being said lowering the KH is not a problem. Plants will love it and your fish will do fine in a KH of 2.
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