I have found four of my crabs that have these black spots on their legs and one has it on his shell! I think It's a bacterial infection! What do I do now! I took all of the moss out. Is it the moss? I scooped about 1/4 of the substrate up and through it out. I can't take the substrate out cuz I have molters. I don't believe they are affected because I really believe it's from these 4 hanging around in my moss pits. What do I do! I'm a nervous wreck! Plus Mr Crabs 2 (who has no black spots) who I believe has been suffering from PPS, just lost one of his legs today! I removed him from the main tank and put him in ISO in a hermie hut. But....what if he's sick and gets my other two molters sick in there? Ahhhhh! I don't know what to do and I'm worried about my babies, someone please help!!!!