I built a new house and had a well drilled. The well has produced the darkest thickest clay, we have let it run for 2 to 3 days at a time it will clear then turn gray again producing clay shale. The well guy raised the pump to 125ft in a 195ft well and after couple hours it ran perfectly clear for week and a half then was gray again. I ran the water for 4 hours and it has been clear again for 2 weeks, now its gray again but after 2 hours it has cleared up but not all the way. What is happening ????