I have an area on my property that I am thinking about having a pond built someday. I want to leave some of the existing trees to provide some shade. I have mostly Maples and poplars, with a few pin oaks mixed in.
My question is :
Will the oak leaves create enough tannins to cause an issue (fish kill), in a pond about 1 acre with an average depth of 8ft ?
I am asking this because I dug a small frog pond last summer (10-12 ft diameter x 3.5 ft deep), on the edge of my yard, with an oak tree right next to it. This Fall, the oak leaves were all through it and the water turned a dark tea color. It did not seem to hurt the frogs, but I really don't know. I was still seeing some when the water was tea color, but I feel that most of them moved out or started to hibernate in the mud, because it was already cold when the leaves started to fall.
