Hi There, I have two octos a bimac and vulgaris. I've run into a slight situation with my vulgaris. He seems to really enjoy ripping appart my live rock and creating his own aquascape(which is Fine) My only concern is that I'm afraid he may hurt himself one of these days. So I was wondering if any one had used any glue to anchor their rock and if so what kind? I know it has been discussed but I'm kinda paranoid about what I put into my tanks.