Well, I'd BUY some to take care of the feather in my tank. I keep ripping it out, it keeps coming back. It just about killed my bubble coral before someone told me that was why the bubble was dying back. And to think I thought the stuff was pretty when I first started seeing it...
Kim
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I have a Longnosed Butterfly. I've had him for about 8 months now and I've never seen him pick on anything. He does follow me around the tank wanting food though. And if I have to put a hand in the water for any reason, he will come and pick on my hand-guess he wants to check the flavor...