I have a 7.5 acre, 3 year old pond in central Alabama. It is constructed in the "black belt (alkaline)" area. I have had a very frustrating time getting a bloom. Alkalinity has been tested at 140. I have heavily fertilized (usually double the recommended rate), and after a week or two of no bloom, the filamentous algae takes over. I then spray the algae with Ktea or Cutrine, repeat the fertilization after weeds are gone, only to have the same thing happen. Right now (November) the water is so clear you can see the bottom at 6 feet and algae is everywhere. Is it possible my alkalinity is too high? Any suggestions would be appreciated. By the way, I have followed the advice of several pond specialists with no results.