Dave, Most of us are in the same boat as for "concerns", but at least we're talking concerns over a forage base. Threadfins are somewhat difficult to establish, fatheads get wiped out...and I seriously doubt the Bgill has it's reputation at stake with Tilapia. The Tilapia's life cycle will only change a feeding period for 1/2 year..hopefully we'll work together to manage the results. I'm sure we'll all learn a lot thru this forum, but for now, I simply want to use all phases of the food chain. I know fertilization hurt you in the past, I won't go that route for now, rainfall is too unpredictable in our area. But, look on the bright side, those hot summers allow us this new unconventional option. More trial and error...