Okay, I'm back with more. After we diluted 1:1 ratio, free chlorine appeared to still be above 5 ppm in the diluted batch (>10 ppm in pool water). We then diluted 1:2 ratio (1 part pool water to 2 parts distilled water) and still appeared to be above (but closer) to 5 ppm in the diluted batch. We then diluted 1:3 ratio and finally came up with FC level of about 12 ppm (3 ppm in diluted water times 4). What do we need to do next to clear up our pool? Oh and it said to check for combined chlorine after 5 minutes. We checked after 5 minutes and there was no change in the color.
We can barely see the bottom of the pool. It isn't really green anymore, just cloudy. We also just had a couple of inches of rain in a brief time period this afternoon, which brought the water level up by a couple of inches, and we aren't yet sure how rainwater affects everything. Our sample was taken from a depth of about elbow deep, just after the rain started.
DH bought a vacuum that attaches with a hose, and a hose for it, but I don't think the hose will work with our pool as I think our pool hose is bigger (probably 1 & 1/2") and the hose he bought is only 1 & 1/4". They only had the 1 & 1/4" hose, so maybe I should order a hose online? I'm not sure what else to do.