My first yellow tang suffered from black spots when I first got him. I did the freshwater bath for about 4 minutes and that was enough. This is easy enough if you can catch the fish .... but catching the fish is pretty stressful in and of itself so you definitely don't want to do it more than once. Actually usually the tang won't let it happen more than once, they're not all that dumb..
Anyways the black peppering does fall off after a freshwater dip. But like EmilyB says it's a bit of a crapshoot.
If it were me I'd be thinking about the freshwater dip ... once should be enough.
(It's too bad the freshwater dip doesn't work on ich..... that would be too easy.)
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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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