Wowsers - George's fingernails must be tougher than I thought. :o :lol
We've got two different kinds of GSP in our tank...the longer polyped ones seem to be especially tough to get off the rock, and basically have to be cut or chisled off. I used to lean the rock they are on up against a base (bottom) rock in the rock structure, but not any more - they grow so fast, that they encrust on the nearby rock in a couple of weeks. NOW I keep it on the sandbed at LEAST 3-4 inches away from the nearest rock structure so I can catch it and frag before it grows onto the nearest rock. It's fairly easy to control as long as it stays on the sandbed.

JimD - LOL - I'm surprized...seasoned reefer like you! :roll Is the GSP in your main acro display tank, or do you have another tank going now?

W.