When submerged weeds regrow to low densities add just one grass carp. Then when the weeds get again overgrown to what the 1 GC can keep reduced add the 2nd GC. Use just enough GC to allow 15%-35% of the weeds to be present. Do no eliminate them just keep them trimmed to an acceptable density.


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