The oil should not hurt the fish as it was used to kill mosquito larvae back in the old days. It could be tannic acid instead of oil. If you cut or dug up oak trees, they will seep tannic acid for a long time. The leaves are really rich with this acid. This acid is why many southern waterways are a dingy brown color.


Two ponds, 13 and 15 acres on the Mattaponi River.