I'd stopthe home made stuff and get a good basic flake , You don't need to poulute the system more and feed a pinh 3 times a week . I have large fish and I'd cut a cube in half rinse it and not feed them the whole thing . They will start to look skimnny if they need more food . We have a convict tang that was rail skinny and I use him to figure what more needs food.. Fat fish are like fat dogs cats people not very healthy really . Rememeber they no longer have to swim miles and miles to eat a blade of algae .