PoolDoc - We had the filter media changed from the Zeobrite to sand. In addition, a chlorine demand (24 hour) test was performed and the chlorine level was very low. We added ten pounds of turbo shock and five pounds of super soluble chlorine and it appears after a day or so that the water is beginning to clear. Will take the water in for another test in another 24 to 48 hours to see where we stand. All of this rain that we've been getting in the mid-atlantic region isn't helping either. I do appreciate your help and advice. You always learn new things from people in the business.