I got an eel {about 6-7'' long} from a friends dad and he's in my 10 gallon right now but i want to put him into my 30 cause he's obviously to big for the 10, but i have 4 dwarf congo frogs and some smaller fish like albino coryodora's algae eaters etc. and the eel we'll eat small crustations, worms, and crickets if you feed them to them, and i dont want my frogs to get eaten, so if anyone can tell me if they would or wouldn't be ok...