Never mind, it worked the first time.
This guy is looking for help. His pond has been crystal clear since 1984, this spring it turned to this color. Soil is peat (the pond was dug in a swamp), nitrates are .2mg/l nitrites are 0.0mg/l.
Boiling the water does not remove the cloudiness. Putting in the dark for 3 days doesn't clear it up. He says bleach cleaned it up in a glass. He said he used a "grain elevator referred" herbicide that came in small pellets (I assume Karmex) and that didn't work. Green Clean didn't work.
He does have a rabbit-raising facility onsite, but all wastes are filtered and the pond stays below government mandated BOD levels.
My first thought is that soil problems would settle out in a glass, and cloudiness that comes from clay would require a clay source (not here). Tannins in my experience stain water but do not cause the chocolate milk look.
This makes my only guess to be some sort of planktonic algae (daiatoms?). I would appreciate any help, this one's a stumper.
