I had this stuff on a frag of hermans reds. It grows fast! I took the frag out, pulled all the briopsis off with tweezers and then covered the whole thing in superglue. All around the polyps, between them, under them, everywhere! Worked out great, although its been 3 months and no new polyps on my frag. I'd rather wait longer for the frag to grow than have to deal with that stuff.