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Re: Aquatic Plants Digest V3 #692

I teach chemistry in HS and I have noticed that people use KNO3 (potassium
nitrate) in their tanks.  My question is that in the schools we receive
everything in concentrated forms only for us to dilute for necessary
experiments so how strong is the KNO3 that you are using?   How much KNO3 is
typically used and how often?