We've had our Betta male since March. Within a week of getting him, we got him a proper 3 gallon tank with heater, thermometer, airaetor, bio wheel, and charcoal filter. His water is always pretty close to 78-80. I change his water (about 2/3 tank) every week to week and a half and I add the water conditioner to tap water.
About a week and a half ago he started being a lot more lethargic than normal. Sleeping during the day, laying on the bottom of the tank. I started doing water changes a bit more frequently and have tried turning on the tank light during the day more often. I usually leave it off all the time and the tank is not in a super bright room, so I thought maybe he wasn't getting enough light, but he'll still sleep with the light on.
Could I be feeding him too much? I feed him 2x/day usually 4 tiny round pellets that say to feed 3x/day and the other feeding either a few dried bloodworms or a small clump of freeze dried brine shrimp. He's still hungry and wants to eat all his food.
His fins seem fine. The one thing I haven't replaced in his tank is the charcoal filter which says you can replace it monthly, but the store we got the tank from doesn't carry them.
Any suggestions or ideas what might be going on?