The FROG Serene Floating System is an easy way to keep your hot tub water clean without any guesswork. With FROG's pre-filled replaceable mineral and bromine cartridges that last up to a month, there's no need to measure and add chlorine to your water daily.
- Sanitizing minerals act quickly to make hot tub water clean and clear
- Low levels of bromine dissolve over time in hot tub water
- Cartridges last for weeks