Jack's Magic The Stuff Cleaners, 32 oz, Pink

I disagree with the reviewer that said Jack's Magic products do not work. To the contrary, I have found the Jacks Magic products to be some of the best available. Our water naturally contains high levels of iron, and Jack's Pink Stuff helps the filtration system get rid of the iron, plus at higher doses, it will remove light staining. Unlike other products I have tried, the Pink Stuff never causes the water to go cloudy. I also use Jack's Magic Saphire Stuff after my pool is started up and everything is all in balance. The Saphire Stuff is an all-in-one product that keeps my pool sparkling!

Works great, but too expensive to continue to buy.

May be ok but did not alter stains in my concrete pool.

don't buy any Jack's Magic products...they simply do not do what they advertise on the label. Go to reputable pool sites and you will find effective solutions for your stain problems and save time and money.