I am in the process of replacing a pump that started as an old windmill well converted to a solar pump to feed a stock tank. I figured check in here quick to see if anyone knows about sediment in the well and what issues I could be facing if any at all? Gist of the story is that this pump hasn't been working for quite some time so I pulled it today and noticed that there was a bunch of black muck for lack of a better on a good portion of the output hose while bringing it up. If I replace the pump will this need to be pumped with something or is this muck a non-issue?