No, depth is 33 feets, that is where the air difuser is intalled. Actually the algae bloom looks like it is everywhere: surface and bottom. More strange: in the bottom it is completly dark: nolight reached the bottom because all light is filtered in the first meters of the water column.
I will take pictures at various dephs. Also, I havee the quemical analisis of a awater sample , taken before the aereation started, want to see it?