I have cured Ich successfully multiple times with heat alone.
ALSO there are ALOT safer ways to cure Ich than TOXIC copper. Kordons Rid Ich, or API Super Ich cure.
While we are on the subject.
A piece of understanding?
For years the standing treatment for Ich has been heat and aquarium salt.
In fact the salt does nothing to combat Ich. But Salt DOES improve gill function. Warmer water holds less O2, so I was under the impression the salt is to help the fish cope with the heat, right?
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The salt dehydrates the Ich. That is the theory anyway.
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Yeah the salt is a better option if you can't raise the temp as high for some fish. Raising the temp to 86+ and there should be no need for salt.