caring for fresh water moray eel

It all depends on what species... If you're looking at G. tile, I had one of those guys once upon a time (before I got too chicken after nearly getting a finger bitten!). They prefer mid- to high-end brackish. As for food... Mine ate anything. Silversides, frozen shrimp, krill. As soon as the light went out, he was prowling around looking for the feeding tongs.