Thanks for your advice. Here some answers:

>It could be a slight case of swimbladder disorder. Yes, peas help this issue or so I hear. I know my female beta liked to eat them before she passed away.<

Did you give the peas raw in small pieces?

>Don't feel bad about starving them. Fish can live off the fats in their liver for at least 5-7 days. Feedings should be only once daily.<

I feed once a day, but not every day. I often skip a day.

>What other kind of fish do you have with him?<

There is a female betta in the tank (5.5 gallons), separated with a separator.

>Do you have a water testing kit?<

I don't have a kit. I can get one tomorrow, though. The female in the same tank is perfectly healthy it seems like.

>Also, how often do you do water changes?<

It's a 5.5 Gallon tank with an in-tank filter. I change about 1-1.5 gallons (20-30% of the water) every 2 weeks. So far, they have been doing real well with that routine. The female still is.

Carolina