Works great and is easy use.
FROG Serene Spa Bromine Cartridge for use in the SPA Frog Floating and In-line Systems or as a stand alone floater.
- Simply open the cap, pull up the holder and snap in the cartridges.
- Adjustable to meet the needs of each spa.
- Lasts on average 2-4 weeks.
- Simply discard or recycle and replace.