Betta Fish getting pale
How long have you had the betta? Their lifespan can be as long as 7 years, although some only live for 2-3, and they're usually between 6-9 months old when they're sold in stores.
That's just sooooo wierd! Those things live forever! My friend had one and it lived for 5yrs. Now I have one and it has been alive for 3 (As far as I know..) (Got it as a favor for one of my friend's b-day parties) (Don't ask!!!)
So back to your question: Go to the pet store and ask around. It can't hurt. And If they can't help I don't konw what to do
It could be that his water is too cold. My bettas get pale when they are too cold. He should be in a minimum of 1/2 gallon of water. Make sure you have a thermometer on the tank so you can make sure it stays in the right range. Hikari makes something called betta revive that can help to perk him up a bit.
Okay, here's a few things that have worked for my bettas.
One. Check the amount of light he is exposed to. Don't put him in a window or anything, but if he's in dim light in a corner or something, he might benefit from a little more illumination.
Next thing would be to put a little mirror by the side of his bowl/tank. Seeing 'another male' can snap them out of a depressive state.
If he's having noticable trouble swimming down, he might have a swim bladder infection. They sell medicine you can add to the water at most pet stores.
First, I'd start off with the water change. Make sure it has been treated with chlorine remover and allowed to reach room temp first.