ive also heard that feeders are high in fat.. and hold almost no real nutrition.. i fed my oscars shrimp, krill, worms, crickets, bugs, spiders, bloodworms, and he loved some veggies like zucchini and pumpkin.. (i was feeding the pleco and he hogged it). guess they will eat almost anything you put in there..i also fed a treat two times a week of a frozen cube of stuff-id switch it up. i never used feeders.