Introducing a breakthrough in sanitizing that comes ready to use on your hot tub.  With the built in FROG @ease In-Line System, you simply open the cap on your hot tub, snap in the conveniently adjustable cartridges and enjoy weeks of cleaner, clearer and softer water. FROG @ease uses FROG Minerals and SmartChlor® Technology that creates Fresh Mineral Water®∞ by killing bacteria two ways with up to 75% less chlorine and a lot less work!