I have a 1.5-2" maxima that looks pretty dead. I went away for a weekend and when I came back the poor thing was open with it's tissue slid down in the shell, the mouth looked like a hole instead of a slit and I thought it was dead. I went to pick it up and get it out of the tank and it did close up so it's still alive. I have done regular feeding with DT's (every other day) and it's been sitting under a 250w DE metal halide. There are no fish in this tank and I haven't seen any hermits or other animals bother it. Is there anything I can do to attempt to save him? Would a freshwater dip help possibly?