I have 4 red wag platies and 2 albino cory cats, I feed them TetraMin Tropical crisps twice a day. Two of my platies are very agressive when it comes to eating and the eat all of the food i put int the tank(besides a few that make it pass them). The two other platies are a bit smaller than the other ones now. How can i feed them and make sure that the other one's get food but still not over feed the bullies. FYI the cory's are doing just fine with the left overs that fall to the floor.