10-28-2006, 11:27 PM
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I'll agree with the question as to why lower the pH? What kind of fish are you keeping? There are many safe ways to soften water, but be careful not to make drastic changes, as the fish won't be able to handle it.
Adding peat moss to the filter will also soften pH, and it happens gradually, and safely. There is nothing dangerous to leech into the tank this way, nothing to measure, and no way to "overdose" a chemical.
It's important to know what fish are in the tank before lowering pH, though, as some fish cannot handle the softer water.