Super glue doe snot disolve platic per se..It may get hot if there is too much on certianitems, but its not designed to melt plastic. Rocks do not have to be removed to use super glue gel and it in no way harms the tanks. Too much paranoia is set up with tanks and chemicals and putting hands etc in them after washing them, and all kinds of other crap. You wul dhtink these critters are made out of the most delicate stuff in the universe, which they are not.....sheeeeeeeeesh!