MRHELLO,
Rainman is the TP expert, but my first thought was overcrowding and a lot of dead fish. If you have nothing to eat them as they die I would think you would have one stinky mess on your hands. Or a whole bunch of turtles, racoons and muskrats visiting your pond!
Even if you caught some of them, TP are reproducing machines from what I been told. Keep in mind this is just my 2 cents and that may be about what it's worth. As I am no TP expert for sure, but I think you could loose control of that pond quickly if your not careful. I am sure they would clean it up for you though. With so many in there you may have one of the cleanest ponds in O.K.
