Ok - wanted to get back with my results. I put the Proteam Metal Magic in Sunday night and was travelling until today. Pump ran 24/7 since Sunday with the pool covered with the solar cover.

Tonight, when I uncovered, all stains were gone. I really could not believe it. Marie - you were right on the Ph. It lowered it to 6.8 - my pool has never been that low. Lowered the TA only by 10 - so I'm at 100. Threw about 2 lbs of borax in and will test again tomorrow.

Thanks again for all your help - pool is immaculate once again.

Oh - one more question. I was reading that the magic eraser works great. All my grout below the water line is sparkling white, and above the waterline is pretty grungy. I suspect the chlorine keeps it white below the waterline. Here's an idea for the lazy: Instead of using the eraser, I wonder if I could "overfill the pool" to above the groutline, then shock to see if the grout would come clean. Then drain back to normal water level. THoughts?