Hi guys, I have looked through previous posts, but haven't found anything exactly like what's going on with Yabby. My daughter brought home a crayfish from school, obtained from a farm in Florida I believe. I researched a ton and thought we were doing everything right but I fear he is fading. We have had him for 1 month. At first he ate like a champ and was active. Now he hides all the time and doesn't seem to be eating much if at all. At first I thought he was molting, but he never did, then got better, now he's doing it again but worse. We have had an air stone, gravel and hiding places the whole time, and always let the water sit 24hours before adding it to the tank. I was told by the pet store that we didn't need to cycle the tank since he'd been sitting in a tub with 11 other crayfish for 2 weeks in the classroom and was fine. After he first started slowing down I added beneficial bacteria supplements, then a few days later iodine and a cuttle bone chunk. Now he also has a filter. We have done 2 50% water changes since we got him. He has one spot inside his structure he sits in and I haven't seen him leave it for 3 days. Could he still be molting? How long do they hide out and refuse food? Could my nitrates still be high despite filtration, water changes and bacteria supplementation? My daughter is in tears worrying for him. Help?