I have my 3 CWD (about 2 inches svl)in a 60 gallon enclosure. two of them seem to be on the floor of the tank and rubbing their nose on the side of the cage while flailing their arms and throwing substrate around. their noses is dark colored now. They did this when i had them in their temporay 20gallon tall tank and their doing it again.Please help me.Thank You in advance


