Hi there, we bought a house that as 2 koi ponds. The pond has always been cloudy. This year I was determined to get the largest one clear. I pulled the pump up yesterday cleared some debris & today the pump stopped working. It seems to be surging trying to start but won't stay on. I took it apart and all of he moving parts are working. Now it's just caput! I really don't know enough about ponds but I am willing to learn. Please advise! Thanks