I appreciate everyone's inpout and advice, to answer Theo's question the pond is over 50 years old and is located in Vernon, Florida which is northwest Florida. It is stocked with lmb, cnbg, and catfish. It is between 8-9 acres. My lmb are skinny. I just increased the feeders to four times a day to try to stimulate the bg, but back to the topic, if tilapia is the direction I want to go does anyone know of anyone in the northwest area of Florida where I can buy them.