Not in my opinion, because, except for the weight of originally stocked tilapia, all "new" Tilapia weight came from nutrients consumed in the pond...no net gain or loss of matter. It's just that the nutrient is in a changed form.
If you stocked 20 pounds in the half acre pond described in this thread, that 20# is the only additional load. All growth and reproduction is supported by currently present nutrient. If feeding fish, that would not be the case as the weight of feed would be a new nutrient load.
If you use Copper Sulfate to kill algae, there is no new nutrient load from the decay and regrowth. There is however, an increased BOD during the decay process.
Last edited by Rainman; 05/20/15 02:20 PM.
