Hi all I have an adult axolotl who has never had any problems eating or with pooing but recently he seems to be unable to swim/keep his centre, when he floats he seems to be rolled on his side or when he's trying it swim it looks like he's he's having some form of sezuire he's really struggling to move in general his water is the right temperature and has he's water changed and treated frequently any advise will help as I'm very concerened