FROG 01-01-5450 Pool FROG XL Pro Fresh Mineral Water Sanitizing System 40K gals delivers what no one else can – Fresh Mineral Water® in your pool. It kills bacteria 2 ways, with a small amount of chlorine and FROG’s Fresh Minerals. A 6-pound Chlorine Pac keeps pools up to 40,000 gallons clean and clear for weeks and weeks. You use less chlorine, spend less time and effort to maintain the water and have more time to enjoy your pool.