I bought a house on a 2 acre by 2 acre pond. It has fish a plants in it. Bass and perch not sure about catfish. I have what appears to be black crude oil bubbles up when you walk out into it. Very very small amounts mind you. The oil I believe is just from the ground as it wasn't an oil retention pond or anything and the area is known for being an oil field boom town. My question is, is there a way to clean the oil out of it with microbes or something or is it maybe something else going on?