i doubt over feeding is an issue. I feed 4 pellets a day.
Water quality is a maybe. I usaully change 25% every other week
And this thing desperately needs a frickin heater. I *had* a heater but my bro took it for *his* 10gal which has a fantail goldfish and 5 white clouds.
I got it for under 15 bucks at Petco yesterday (with the Petco Card). I noticed they were 10.99 online though, but I don't know what shipping was and their store doesn't match their online prices.
You should take the heater back from your Bro . . . Goldfish and White Clouds can handle the swing in temperature much better than your Betta. Especially since Goldies and WC's like colder water anyway.
Does you betta have a place to hide? Mine always like to have a little "room" in their home.
On a side note big54bob, I can't get my dragons to display like yours! I won't keep bugging you, I know this is a fish site, but help! lol