Quote:
Originally Posted by MrTuskfish
Sure, it can be eradicated. Fish in a QT with hypo, copper, or tank-transfer and DT fishless for 10+ weeks will almost always eradicate ich. Nothing is 100% certain, but this works most of the time. This is very common practice and has worked for many people on this forum.
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Nothing is 100%. There are always exceptions to every rule. Is there some strain of Ich out there that can survive hypo and/or copper sulfate after one full month... or not starve after 9 weeks without a fish host to feed on? Yeah, I guess there's a very small chance of that. But in 30+ years of saltwater I've yet to encounter it!