Most cb polys just dont know when to stop eating, in my case thats what happen. When i had mostly cb polys i was feeding a whole tilapia everyday cause the cb eats alot even when they are small, now that i have mostly wc i feed a whole tilapia every other day and my polys are bigger compare to the small cb ones.that is an interesting point. I wonder if it is metabolism slowing or if it is inability to stop when full. Hmm.