Hello :-\ my tank is 5 galons, with 2 cories, 3 male guppies. i try not to feed them very much, once a day, and the cories get a pellet every 2 days, when i give them the pellets the guppies go nuts and eat them?? is this normal??? are they starving or something? they wont let the cories eat, eventually they do but the guppies eat so mcuh of the pellet that they look so fat. and there is white fungus like stuff that grows on my fake plants within 24 hours of me cleaning it off! i'm worried about my tank is there anyone who has some advice for me i woulod really appreciate it thanks. ???