Also, are there betta treats?

There are many different foods that you can buy at your local pet/fish store.  I have always had great results with Hikari betta food, but this is pretty concentrated stuff (expands a great deal in water) so I never feed more than two pellets per meal. 

But a betta won't live up to its full potential - or lifespan - on any one food.  Try frozen or feeze-dried blood worms, tubifex worms, and mosquito larvae.  You can even hunt your own mosquito larvae in the summer months, just make sure you use caution.  Bettas will also take daphnia, or water fleas.  They will take flake food, but you have to be careful about how much you feed, since they won't eat much at one time.  Remember, he has a very small stomach!

You can feed him many different types of frozen, freeze-dried, and processed foods.  Look around at your local stores - a lot of them will have a freezer for the frozen foods.  You can feed him brine shrimp, fruit flies, baby shrimp...the options are endless.

Try googling some of those foods to learn more about them, and see what's available at your local stores.  The trick is variety!  Stock up on a couple kinds and rotate.  Feed him one thing for breakfast and another for dinner.  Change foods out weekly.  Just shake it up a little!  Whatever you do, don't overfeed.  This will make him unhealthy and shorten his lifespan. 

And remember to have fun.  :)

I feed him aquarian betta pellets.

Aren't cooked meats and some veges good too? Some of the bettas in the "beauty below the surface" contest were eating cooked peas.

Also, are water fleas those little bugs that looks like fleas on the water (duh probably) but if there is some on the knob on my heater so are they a problem?

Bettas are carnivorous.  Some hobbyists might feed them vegetables on occasion, but it's not a part of a natural diet.  Peas are often used as a treatment for digestive upsets.

Small amounts of cooked meat are okay, but I wouldn't recommend red meat for bettas.  It's just too messy and not efficient.  You can try VERY small slivers of cooked chicken or fish, but you're better off just feeding them the aforementioned foods.

If life gives you lemons, squeeze them into people's eyes and run away!

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