I'm not sure how to tell the difference. I seem to recall that the visual appearance of the fish was more of a "fine dusting" with black ich, as if someone had tapped a pepper shaker onto the fish. The "particles" (for lack of a better term) had more of a 3-dimensional appearance to them. Sorry I can't be a better help with ID'ing one over the other. Just that if you do a FW dip and it fixes the problem, it's black ich, if it doesn't fix it at all then it's Cryptocaryon..
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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