My neighbor recently installed a rain drip 1/2 micro watering system, running 20 1gal. drippers across 200 feet of line. This past weekend, he ran his system for 30 minutes and shut it down when he noticed the water coming out was brown (chocolate milk) color. The same is true for all of the taps in the house, he says...Has anyone had any experience with this problem, perhaps a shallow well? Any advice wouldbe helpful.