Tearing apart the tank, bleaching the rocks, and the tank...ECT...leting it dry out, bleach evaporates compleatly, it is safe, I have does this myself to rid my tank of a fish lice that infested the whole damn tank! I lost some fish because of "tainted" feeders, boy did I learn my lesson, they now get a "salty" fish bath before they are fed to any of my tanks!
Jen
Jen