I've always had an abundance of string algae, even over the winter months. No matter how much I clean it out, use barley, bene. bacteria, algaecide, it I see new growth daily. Anything I might be missing that might help. Also, I did drain the pond this spring, but I now have dark water, tea color kinda. I don't have any leaves or pinestraw in it that could be causing it. Any ideas or how to clear it up? I am using a clarifier, not helping yet. I live north of Atlanta, Ga. The pond depth is 2 to 3 ft in some areas.