I disagree. I had a fish in QT for 8 wks, was healthy/active/eating. NO signs of ich at all. He was the 1st fish placed in a newly cycled tank, 4-6 wks later he's covered in ich. All this talk about passive QT, watch and observe, no matter for how long, is a false sense of security! Any fish or invert coming into my tank is assumed to have or be carrying ich, and is treated in QT for it. If your QT is watch and observe, mark my words ich will strike at some point!
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