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Re: Aquatic Plants Digest V5 #331

Paul Sears wrote, in part: "Don't add more than a tiny amount.  The NH4+ ion 
is in a _very_fast equilibrium with NH3.  The concentrations of the two are 
equal at a pH of about 9.25.  At pH 8.25 the NH3 concentration is 1/10 of 
the NH4+ concentration, at pH 7.25, 1/100 of it, and so on."

And I wonder, in my 72 gallon tank, KH=4.5, pH=6.6-6.8, how much is "a tiny 
amount"? Would adding 1/4t be stressful to the fish? 1/2t?


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