Smallpond -- it is just that time of year. My main pond and my larger grow-out pond went from greenish/murky, to very clear, to very blackish-clear in the last couple of weeks.
We are getting into the 30s and 40s most nights lately, which I assume you are also. That has diminished much of the biology in the pond water. With all of the hardwood trees we have in this area, especially all of the oaks, they add a lot of tannin to the water. Tannins will precipitate a lot protein and other organics from your water, making it relatively clear -- but much like tea leafs, it will also color it a very dark color.
It is a natural occurrence in our area of the Appalachians. The trout will actually love it and flourish in it.
