I've got a beautiful red male delta tail about a month ago, and my three year old son named him Diggy.
I bought Aqueon Betta Pellets with him, and it says "feed several times a day in small amounts that will be consumed by fish within three minutes."
So, on the first day, I gave him one after one for three minutes, counting how many he eats.
He ate 25 pellets!
From then, I give him 20-25 pellets twice a day (so, 40-50 a day), everyday.
He eats them all within 3 minutes. A few drops to the bottom of the tank, which I net out afterwards.
He has a slightly bulky belly, but not apparently awkward, and doesn't seem to suffer constipation; he poofs a lot.
He is healthy and active for over a month.
Yesterday, surfing the web, I realized that other people give their Betta fish just 4-5 pellets a day! And even fast a day per week?
OMG! My Diggy eats 10 times more.
Is he eating too much? I feel terrible if I'm mistreating him.
But again, he looks healthy (I think he grew up quite a bit over a month).
For those of you who haven't seen Aqueon pellets, it's about 1/16" (~1mm).