06-30-2013, 11:03 AM
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Welcome to Tropical Fish Keeping forum.
My only addition to what has been suggested is when in doubt use less rather than more chemicals. In other words, if you cannot find the specific products mentioned, it is usually better not to try a substitute. Some of these things do more harm than good, unfortunately. And we all need to remember that every substance added to an aquarium, no matter what it is, is adding chemicals and total dissolved solids, and these do affect fish to varying degrees. The more "natural" one can be in a fish tank, the better and safer, generally speaking.