I have been putting Tilapia in my personal pond for a number of years now. What I've observed is along what George has seen. While the Tilapia have been raised on pellets, at least in my pond, even tho I'm feeding the fish pellets, I see very few if any Tilapia feeding on pellets. They seem to be doing a good job on the FA.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).