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Sv: Aquatic Plants Digest V3 #1234
>I'm missing something here. Why would a rise in KH release ammonia and
>kill your fish? KH and pH should rise together, right? Changing the
>water should reduce any concentrations of ammonia, unless the new water
>contains ammonia. What am I missing?
>Regards, Steve Dixon in San Francisco
Assuming it is correct that ammonia in English is NH3 and ammonium is NH4+, this is the equation:
NH3 + H+ < > NH4+
NH3 is more toxic than NH4+
When changing water with water of a higher KH and pH, the proces goes to the left, making a higher koncentration of ammonia.
pH 6 7 8
NH3% 0 1 4
ole.t at larsen_dk