About this item

• FROG Serene (formerly Spa FROG) replacement cartridges give you weeks and weeks of ahhmazing hot tub water, fit the Floating or In-Line System
• FROG Serene is a complete sanitizing system that kills bacteria 2 ways with a low level of bromine and FROG Sanitizing Minerals giving you peace of mind
• FROG Sanitizing Minerals reduce bromine use up to 50%*; this bundle includes 4 Bromine cartridges for weeks of ahhmazing hot tub water, which last up to 4 weeks depending hot tub size and usage; ideal for 600 gallon hot tub
• This bundle includes 1 FROG Sanitizing Mineral Cartridge, which lasts 4 months; minerals kill bacteria, condition the water for softness and absorb acids – water feels much more comfortable
• Prefilled Cartridges mean no touching or measuring bromine – no mess, no guess, no stress!