ok. i know there are all kinds of different glues u can use and i've seen people post using super glue and a bunch of different kinds. my question is, are there some super glues u cant use? or can u use any of them? and do u have to take the frag and the rock out of the tank to glue it or do u put the glue on the plug and stick it on the rock? doesn't it put the fumes and stuff in the water and isn't it harmful to the corals/fish? any input on this would be greatly appreciated.. thx!