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To my knowledge, the answer is that they do have ich at the fish store, but - with either ich management techniques used in the hobby, copper medication/hyposalinity in fish store tanks (from what I've heard, in most cases it's probably this one; non-therapeutic levels of copper/hypo), or a combination of the two - the ich is suppressed (not eliminated) at the store.Why do new fish get Ich when you add them in your tank? And how does this happen if they don't have Ich at the fish store? Where exactly is this Ich coming from?
There's nothing to "buy"...I think it's because they were in water with the ich or ich "eggs" and some of that got carried over. I don't really buy the idea of subtheraputic levels of copper masking ich as the fish either has an infection or it doesn't.
Agree. Specifically hyposalinty masks ich. Your fish store is likely running salinity at a lower level than your reef. 1.021 versus 1.025 or 1.026... this causes the ich to lay dormant until it finds a suitable environment.There's nothing to "buy"...
Why??Can I add a low dose of copper in a FOWLR tank?