I get mixed answers on how much to feed my fish. I've got 3 Yo Yo loaches, 3 corys, 2 clown loaches, 6 black ruby barbs and 6 tiger barbs in my 29 gallon tank. I feed once or twice a day with both sinking pellets and flakes. Is this too much? I don't know if certain fish need more regular meals than others. My filtration system should adequately handle the waste (1 Whisper 30, 1 Aguaclear 200, 1 Penn Plax undergravel filter).