I use omega cichlid flakes my young discus love it more than the cobalts Discus flakes they spit that stuff out so I ended up feeding it to my mixed tanks ... I bought brine shrimp flakes from brine shrimp direct and the the discus ate it right away ... I also feed frozen brine Al’s fdbw and hikari bloodworms tried San Francisco Bay and they were not too fond of it .. I also feed tetra color granules ..once a week I will feed homemade beef heart mix