Hydrilla hit my one and half acre pond last year - now it is starting to grow again and spread. I put 20 grass carp in but I cannot tell where they are having an impact. Suggestions? Do I need to treat with Sonar? Thanks

Hey, Tim. Sorry to hear about the hydrilla. When did you put in the grass carp?

I put 10 in end of last summer and another 10 in about a month ago - I was worried the first ten got washed out over the spillway when we had a big rain but my guess is they are still in there. My pond is clear and with polarized sun glasses I can walk around and see from my shoreline and I do not see any carp -