As CJBS mentions if the plankton conditions are not correct most of the fry will not survive. Then those that do survive have to live long enough to make it to breeder size. Often in established waters it is in the end more economical to stock the adults. IF adults do not survive from year to year the pond habitat is not good for production or maintaining GS as a forage species. This general rule applies to all forage species.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management