There is not much vegitation in the pond besides FA. I got them to control the FA. In the spring I was up to 75% coverage of FA. I also tried the barley straw for several months before getting the GC. All the FA disappeared shortly after I got the GC. I think it may have went away last summer also, so the test with be if it returns this fall and next spring as happened last year.


1/6 acre pond in Dutchess County, NY