I have a 3 acre pond surrounded on three sides by large oak trees. The water has become a hazy green and it looks like a form of planktonic algae. I have used Cutrine Plus once this spring already and I'm concerned about overusing chemicals. Also, lost a few oak trees and I'm worried that it may have been a side effect of the Cutrine Plus. I had been doing regular doses of beneficial bacteria, but have not done that in over a month. Looking for recommendations on how to clear up the water. Thanks, Mark