How often do they molt and is it something I need to clean out of tank or will it just be eaten? Never had shrimp and was just a fluke that the store had some so I snatched a few up. They biggest fish I'll have are probably odessa barbs. These guys are pretty cool and wouldn't mind some others. Think they will be ok with the barbs? I'll prob want to wait tili get more plants so there are more hiding places?