Tilapia are hard to over feed. I believe that tilapia feed almost all day on plant matter. When I was feeding large amounts of high protein mine were all fat, with a roll just behind their gill line and I had no algae. When a poacher removed about 50% of my large tilapia I had an algae build up the next day. I stopped feeding for that day and by next morning the algae was gone. So I would say there is a balance, at least in my pond there was. Watch the algae and feed accordingly, also, it never hurts to catch a fish occasionaly to measure your progress.
