My male guppy has been suffering from swim bladder for the past few days (around 4 and a half) . We have tried cooked peas but he refuses to eat them ignoring them or spitting them out. He is getting sicker and sicker. Are there any medicines that would be safe for the whole tank? I don’t have a quarantine tank. And if not should I consider putting him down? I assume this is painful for him. I really want to help him but I don’t know how. Thank you for the help.