In article ,
~ janj wrote:
Fixing a pH problem is on a case by case basis, but to raise pH, baking
soda works great, plus it adds buffering. To lower pH is a touchier subject
and I won't address it at this time, questions need to be asked an answered
before preceding with lowering one's pH. ~ jan )

Too high a pH isn't really a problem. Plants will lower it just by growing
through biogenic decalcification. Old water gets more acid with just fish
in it too. Loweing pH is not the wisest thinf to do and commercial fish
products to do this have nasty side effects.

Vinegar can be used, as can nitric or hydrochloric acid. DO NOT do this
lightly or without fully understanding what you're doing.

It's all good till somebody loses an eye.

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