I'm convinced that the green plants play a huge part in water clarity of my BOW.
I have limed & treated with Gypsum, but if I had to nail down the biggest factor, I'd say plant growth.

Visability always goes way down in the winter. Took this video yesterday.
For my pond, this is excellent clarity.

https://youtu.be/bi2W7SWtKbE


Half acre 30 year old farm pond, Mebane NC. Aeration & feeder.
LMB, CC, SC, BG, HBC, two no account welfare carp and nine seasonal Tilapia that all the other fish are terrified of.