My little sister's betta Coral is ill. Does anyone know what is wrong with him? She's really worried. Tank size: 5.5 gallons Cycled: Yes Water changes: 40% once a week Heated: Yes. 78 degrees Fahrenheit. Food: Omega One betta pellets - two in the morning and two at night Filter: Top Fin Silentstream 10 Ammonia: 0 Nitrites: 0 Nitrates: 20 or 30 Tankmate: 1 Ramshorn snail Pineconing: No Anyone have any ideas what's wrong with him? She got him maybe three months ago and is really attached to him. Is there a way to help him? He is still breathing and he moves in short bursts then floats to the top again.