You have IMO received good advice so far. I assume your P analysis was for total P and not dissolved or ortho-phosphate. I always prefer the ortho-P analysis. Your N:P ratio of 1:3 is low and unbalanced for creating a bloom. N:P ratio should be at least 10:1 to 20:1 for good bloom production.
Perpetual brown color could be tannin stain from pine needles and leaves? Do the other local lakes you refer to have lots of pine trees in the riparian zone?. Cloudiness - visibilities of 18" may be due to stain and suspended bottom detritus and not plankton? Are there gizzard shad in the lake?

Last edited by Bill Cody; 03/15/11 07:35 PM.

aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management