One thing to remember is that different species/hybrids of tilapia have wildly varied food preferences...people want to lump all tilapia together in capabilities and often wind up disappointed.

Know your problem, know your supplier. Studdies show that Blue Tilapia have the widest ranging diet followed my Mozambique. Nile Tilapia are not good for much more than algae control and can have a hugely reduced reproduction rate compared to blues and moz.

Mozambique are great in the southern state climates, and all but useless once you get very far north of the southern tier states.