Glad to hear all is well Don't worry, if you get any stains back next year, you will know how to get rid of them before they become hard to remove. The key is to keep the water balanced with the ph on the low side, and keep up with the chlorine so you don't have to shock very often. Plus keeping the sequesterer in the water at all times. It is the first thing I put in the water when I open in the spring - sequesterer goes in as soon as the cover comes off - then chlorine. Tomorrow I close the pool, I am sad