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I used some of the API salt water after I was advised it would help to clear my molly aquarium fish of white spot disease and after about 5 or 6 days the spots had disappeared and plenty left over just in case.
Love this, I have a fresh water aquarium and this has already fixed a number of issues I’ve had. This is a must if you have an aquarium. First it was contamination and now I have ick... Joys of having a aquarium. Clear instructions in English too!