I use San Francisco Bay's Marine Cuisine which has a mix of stuff in it* but I also have some frozen brine and when I feed just that, my fish are like a bunch of pot heads at a free Dorito store.. they go crazy for it. I but I try to limit giving it a couple times a week.
* Brine shrimp, mysis shrimp, krill, plankton, menhaden fish oil, brewer’s dried yeast, vitamins [choline chloride, magnesium sulfate, iron, inositol, α-tocopherol acetate (source of vitamin E), zinc sulfate, manganese sulfate, calcium carbonate, L-ascorbyl-2-polyphosphate (source of stabilized vitamin C), biotin, calcium pantothenate, niacin, sodium selenite, pyridoxine hydrochloride (source of vitamin B6), riboflavin (source of vitamin B2), potassium iodide, vitamin A supplement, citric acid (preservative), folic acid, thiamine mononitrate (source of vitamin B1), menadione sodium bisulfite complex (source of vitamin K3 activity), cobalt carbonate, vitamin B12 supplement], sodium alginate, spirulina.