I am new to the hobby and would appreciate the help. I have a frag which developed a skin and was trapping gasses under this skin. When I moved the coral the skin broke and the coral underneath started to disinigrate. The parts have stopped blowing away and am left with a white, yellow flesh, that is still ragged in spots. What should I do now? If it is possibly still alive what type of circulation should I have it in to stop this from happening again? What should a growing frag look like?