I feed mine...frozen krill, cocktail shrimp, and any sinking cichlid pellets. They some time try and eat some of the blood worms that I am feeding other fish in the same tank.
I feed mine New Life Spectrum Thera-A 3mm sinking pellets, i also feed them raw frozen shrimp, krill, shrimp pellets, algae wafers, and they even eat mealworms!
Oh yeah... be sure NOT to feed floating pellets or food, it may cause the float situation!!
only one of the brands of pellets I feed them are floating pellets. the rest are sinking. they usually don't go for the pellets till they start to sink anyway and I try to drop the pellets by the filter waterfall so they sink right away.