I am building a pond. Its been filing for about 4 weeks and keeps dropping back down. Its going to be about 15' deep 1 1/2 acres. Right now its only about 4' deep. Today I was fixing the slopes and pushed a rock and a stump into the pond that was right on the edge and in the water it started boiling water for about 3 minutes. I felt like it was a spring that I uncovered what do yall think? Thanks I cant wait to check tomorow. The water did seem clearer and cooler.