Best sellerFROG
FROG Serene Mineral Replacement Cartridge for Hot Tubs for use with FROG Serene Floating or In-Line Systems, for Spas up to 600 gallons
For use in FROG Serene (formerly Spa FROG) Floating System or In-Line System with the Bromine Cartridge (sold separately); FROG Serene kills bacteria 2 ways with a low level of bromine and FROG Sanitizing Minerals The FROG Serene Fresh Mine
$37.95
