Hi all, I have had a little crab Morrow, smaller than a quarter since Sept. 08. It has never molted due my having the wrong substrate....Calci Sand. I'm a victim of actually listening to the pet stores...sigh! Two weeks ago I switched to saltwater moist play sand and needless to say all of my crabs are enjoying it! I've noticed small tunnels being built which makes me very happy, and now the poor little small crab who has not molted has gone under. I'm really concerned that the other two crabs will disturb it as they are somewhat larger and the small one almost seems a little intimidated by the others. My question is....they are all currently in a 10 gallon tank. I've got a smaller plastic 5 gallon tank. Should I move the two who are not showing any molting symptoms, or just let it be. I have had the small one for 6 months now and the others I got with it all died during surface molts 4 months ago so it holds a special place in my heart as being my little survivor while I learned the ropes. Yesterday when I saw the tunnels, it almost appeared when I looked later like the crabs, don't know which, had moved shells over them and kind of messed with them. Thanks...you guys are awesome and I always appreciate your advice.