They do eat like crazy... My DG is actually picking at some algae right now and will still eat tons of flakes! He keeps to himself too only chasing my betta down every once in a while, funny because she harassed him for like the first two days and now he's the boss! I notice he does get stressed easily though, he was acting pretty weird after my last water change until i fed him and then he was fine... Lol How is your cycle coming along? Any change in the parameters?