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Your Red-tailed Sharks (Epalzeorhynchus bicolor), Silver Dollars (Metynnis sp.) and Leporinus fasciatus are all true tropicals and shouldn't have any trouble with the higher temperatures recommended for the treatment of Ich.
If you haven't already done it, I recommend Allivymar's article. You can find it at:
Thanks, I was pretty sure about that. You all know alot about the subject, so I like to run it on here. Allivymar's article saved 15 fish in my other tank. Thanks