Since you asked...
Purchased a 2.2 acre pond in 2001 and it was overrun with bladderwort. 10-15 per acre were recommended so I stocked 30. They did NOT eliminate the bladderwort, but made it semi-tolerable. By 2012, the bladderwort was taking over again. I stocked 50 more, yes 50 more. By 2017, I still had so much bladderwort that it was a hinderance to fishing. I brought out the chemicals and treated the entire pond in sections. That plus the remaining carp completely eliminated ALL vegetation in the pond. Since that time, I've made it a priority to sink 40-60 Christmas trees per year to provide the necessary habitat for the YOY bluegill.
