Thanks guys. Yes - I do have bottom aeration and I also only see this ugly stuff in the shallow areas (beach and sides).
Looking at the pics of the blue-green algae or Cyanobacteria I'm puzzled because mine is not that color at all (when alive or dead). Note I do have alot of aquashade in which might be throwing the color off. How do you differentiate between FA and Cyanobacteria? I included another pic to help.
Also, any issues with swimming if it is Cyanobacteria? We've done so all year and the water seems clean (except the floating mats) with no issues.
