I give my Oscars Massivore about once a week, it's better than feeders, good for adding weight and they crazy for them but they are by no means a staple diet. NLS makes the best food on the market, no question. That being said, my oscars get a steady diet of Bio-Gold+ mixed with Cichlid Excel and have been doing amazing on that as a daily feed. They've gained about 7" of length in the last 6 months and have bulked up nicely. Never seen better colors than on my Red O. Raw shrimp, krill, nightcrawlers, crickets, a mysis/bloodworm/spiralina brine mix, and the massivore round out their diet.