Spa Frog Serene Cartridge Refill Kit – 1 Mineral + 3 Bromine Cartridges (01-14-3856)

Refresh your Spa FROG Serene system in one easy kit. Snap in the pre-filled mineral and bromine cartridges and let them deliver weeks of clean, soft, odor-free hot tub water — using up to 50% less bromine than traditional dosing.

• Complete refill: 1 Serene mineral cartridge + 3 bromine cartridges
• Minerals plus bromine keep water clean with up to 50% less bromine
• Water feels softer and looks clearer, with no harsh chemical smell
• Snaps into your existing Serene floating holder — no measuring
• Bromine cartridges last approximately 2–4 weeks
• Mineral cartridge lasts approximately 4 months
• Decreases maintenance time for routine spa care
  

Specifications