I've wondered the same thing regarding digestion of algae....don't tilapia poop? And it seems there have been a few posts of late regarding the absence of floaters after the water cools. How can one be sure that all those dead tilapia aren't decomposing on the bottom, out of the reach of terrestrial predators, releasing all those consumed nutrients back into the pond?
Are Tilapia a solution that once implemented, need to be continously stocked from that point on, or do they ever get "done??" With the job?
Sprkplug
I think TP are just another tool in the toolbox, potentially. I could see them as a way to break the viscous cycle of FA, by having nutrients in the form of FA converted to TP instead vs just having FA die and sink to the bottom, only to start again. Like Tracy says, pluses and minuses to everything. I don't really have a dog (? fish) in this fight, but the science (or lack of it) has my curiosity peaked. There are some really awesome, detailed threads in this forum on biomass, which is part of what this discussion is coming down to.