ive had him for almost a month now i took him from the store when he was borderline dying his back fin only was like 35% of it now its almost compleately full almost all his fins were gone he could hardly swim so i put him in a 5.5 gallon tank (thats where he is now) with melafix (not a lot just a bit cause i know they are very sensative to medicine) and aquarium salt when i first got him he wouldnt eat though so i killed a couple guppies lol and i put them in and he ate them
ever since then hes been great hes very active and healthy now ^_^