Because Bass are oppurtunity feeders (eat when ever the oppurtunity presents itself) they will eat as many feeders as you put in the tank. I raised a LM bass from 4" to 18" feeding it 10 feeders a week. Crawdads are also a good option. One cool way to raise a "game" fish legaly is to go to a tropical fish store and se if you can find a Peacock Bass. They are cool but you need a large tank. Mine outgrew the 100gal tank that I had him in in a little over a year. I gave him to a friend that has a 360gal tank and he is doing great I would say he is between five and seven pounds now.

Lotta ins, lotta outs, lotta what have-yous