Good evening,

I am testing a new aeration system this winter here in MN and want to generate some meaningful data.

Experimentation will be done using small body of water (about 400,000 gallons). The pond has an average depth of 3', highly organic, and has a fish load. What I would like to do is limit the DO input to one source. Generating DO entirely from the aeration system being tested. No inputs from photosynthesis. I will measure DO in fixed spots throughout the winter. Turning the system on and off throughout the winter.

My thinking is to add black pond dye into the water until it becomes so dark, DO generated from photosynthesis stops. At what secchi disk reading could I assume this happening?

Thanks!