I have been reading this over through a variety of different sites and have found the information vastly useful, especially in understanding the relationship to Ph. As most nitrifying bacteria are reduced or absent in water that is 6.0 and under it helped in understanding what I needed to watch for and to assist in determining my water change schedule. It also made me aware of the toxicity of ammonia in higher Ph tanks (Tanganyikan, ect.) and has assisted in understanding what numbers I should watch for. Hope this might help some others here in whatever tank you have.
Ammonia Toxicity charts
Ammonia Toxicity charts
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