The FROG® is a brand of mineral sanitizing systems for swimming pools and hot tubs from King Technologies. This patented and EPA registered technology creates Fresh Mineral Water® that is Cleaner because it kills bacteria two ways, Clearer because it helps keep the pH in line for better water clarity, Softer as it conditions the water and uses up to 50% less chlorine and Easier to use with pre-filled pacs for no mess, no guess and no stress water care.
Lasts 3-4 weeks
I have an Intel 22' pool and this worked great for maintaing clear water for up to 4 weeks as long as you have proper water chemistry and do your weekly shock. My pool is 10500 gal and we set it to the highest setting and had no problems with longevity. I would recommend using a cover at night to conserve chlorine levels. Don't just expect to throw one of these in a pool and think your done with maintaining your chemistry. The minerals allow for a lower chlorine level.