For what it's worth, I have been treating my tank with Kordon's Ich Attack with very satisfactory results. I lost one neon because I didn't start treatment in time (it's always the smallest and cutest one), but the other two are looking great. I liked what I read about Ich Attack, because it is essentially nontoxic to fish. I use 1.5 to 2 times the recommended dose with no ill effects for the fishes. It does turn your water a nasty brownish color, which I can't wait to get rid of, but it does the job very well.