pulled sumerged pump over a week ago, because after about 10 gal. of water, we ran out. pump screen only had about a dime size hole in which water could get through. well drilled and pump installed in 1972. pump is down 200' replaced pump and now have plenty of water. here is the question. after replacement and after raising pump 6' we are still getting very dark brown almost black water. never had problem until pump replacement. someone said we needed to replace platic pipe. was clean inside pipe when pump was replaced. any sugestions.