Purina® AquaMax® Fingerling Starter 300 is a 1/16th inch pellet. Also, Optimal most likely has a pelletized formula for fingerlings. SPORTSMAN'S CHOICE® FINGERLING FISH FEED is a less expensive option and consists of smaller pellets but lower protein and fat than the Purina and Optimal. Right now, I am feeding my fish Purina® AquaMax® Sport Fish MVP. It has a mixture of both large and small pellets. Also, some pellets are designed to float and some are designed to sink. The MVP has 43 percent protein and 12 percent fat which I like. My fish (channel Catfish and standard Bluegill) don't seem to care what I feed them. They will eat anything. Unfortunately, my Bass are not pellet trained (unfortunately) and I am having a difficult time growing them.