Hi guys I have a 55g grow out tank and the gars tankmates are 2 bichirs and iridescent catfish all the same size 7-8 inches and we had a 3 day vacation I left feeders for them they're quite used to eating feeders and we came home they're all okay until I checked up on my gar he's sunddenly dead or having swim bladder disease can anyone help me and how to cure him thankyou very much