Very little breeze ? I'm a ways from you , but our wind , just stopped yesterday. Do you have a trolling motor for the canoe ?
Very little wind. I have canoe, no motors.
I think you really should look into getting a grid based aeration system. Those pictures are telling me high nutrients, nothing in the pond to utilize them, so that grows a bunch of phytoplankton. With a high fish density, you might experience a summerkill. Dying the pond will cut back on phytoplankton, but what is in there to produce O2? Nighttime is the most crucial time for low O2 events.
I have two springs, one top side. They kick off a lot for just over a pond acre, i'd guess at least 20 gallons a minute. I always thought that was enough. Seems all other fish and frogs are fine. Just never had healthy looking BG floating. Going to start culling a lot here in the next couple months. pH has always been in normal range. But i'm sure its very nutrient rich.