I am in the middle of a slam, raising my FC to 31(per swg pool math table). When I tested this morning my FC was 7.5 (i poured some bleach in last night). Anywho, using my k-2006 kit, and adding 4 jugs of bleach my sample was pink and as I added my drops of r-0871 (100+drops) I stopped bc the water sample was clearing but took on a very slightly brown color but never totally cleared. Using my initial sample this morning before the slam, the water sample cleared up just fine.(FC7.5) Why is this sample getting a tan/brown hue?? Is it metals? We have finished 3 days of heavy showers in our area as well.