i had 3" flame angel go over into my calfo overflow ( 48" X 3" X 4"). I thought he had died and was lost in the rocks or the serpent star had eaten his remains. 4 weeks later I was cleaning out the overflow and he got splashed back into the tank. He immediately went right back to his normal routine of grazing around the rocks. I wish every fish I've purchased over the years had been as hardy as that little guy.