Just be aware of how large your pond is, in ratio to the amount of biological degradation from the tilapia. You not only have to worry about nutrient loading, but also the biological oxygen demand caused by the decomposing matter. Two things come to mind: bacterial infestation during decomposing processes and biological oxygen consumption which will increase algae blooms during early spring. Just go by the rule of thumb of 10 cubic meter for every tilapia dead in your pond.
