There is a reason why many, many hatcheries use GC to keep the FA (F. algae) out of their rearing ponds.....because GC eat FA! Don't believe those who tell you GC won't eat FA. They definitely will.
They also like coontail and sago pondweed. This from personal experience. Stock 4 or 5 GC per surface acre. The first year you won't see much difference but after that you will definitely notice. One or 2 per surface acre won't get the job done. Put new GC in every 4-6 years and you will be happy.
Our ponds, which typically have some FA problems, are like night and day with GC versus no GC. BM61.
