At your Fla location do the tilapia experience winter die-off due to cold? The answer to your situation is greatly influenced on this question.

You could seine some tilapia out and add advanced sized LMB (10 in) if needed. But you have to know if the tilapia will die off in winter and plan from there as unchecked the situation will probably result in reaching over carrying capacity and dissolved oxygen issues (assuming no aeration) resulting in a DO crash and die-off.