Dave: Thats a good point and why I propose adding shad to the mix from the begining. And the brings up another ?. How long does it take for 8-12' of water to = air temperature. In the case of Citrus it can be 65 degrees in the day and a one night hard freeze of 30 degrees can distroy the crop. Deeper water won't change temp that fast will it? It's very important that some one give me the answer to that ?. My town is very unique. for those who have never been here. Brownsville Tx, check it out on google earth, all those long green snake looking features are what locals call a (resaca). Their big ponds(no cover & fullof silt) from where the Rio Grand River changed course through the years. Anyway, there full of tilapia and threadfin shad. Every bass ive caught from them look like footballs. and 2 years ago it snowed on christmas eve here 3-5", thats right Dave you may remember that on the news. Brownsville had a white christmas, what are the odds of that. My office overlooks one of those ponds of about 40 acres and i didnt notice any fish kills. The water is always dark and stained about 6' avg depth? Again its the weather pattern. If it gets cold and some times it does, it don't last long. Hince all the winter texans(snow birds). And my final ? would be if it did sustain cold enough temps to kill the tilapia and shad w/20' water depth would that temp also kill my Fl.LMB. I hope I'm not asking dumb ?'s I just want to know as much as possible before i pull the trigger. Good news for ya'll is I would document this experiment in extreme detail w/pics and data.