FROG @ease In-Line SmartChlor Replacement Chlorine Cartridge, 3-Pack for 600-Gallon Spas

FROG @ease In-Line SmartChlor Replacement Chlorine Cartridges are a three-pack of hot tub sanitizing cartridges for spas up to 600 gallons, made for use without cyanuric acid.

• Fits selected Artesian, Marquis, Caldera and Hot Spring models — choose a cartridge for compatible in-line systems.
• Pairs with the FROG @ease In-Line Mineral Cartridge; both cartridges come prefilled for simple setup without measuring.
• Combines FROG sanitizing minerals with self-regulating SmartChlor — helps manage contaminants while maintaining a consistent, low free chlorine level.
• The system uses up to 75% less chlorine — designed to be easier on skin, hair, swimsuits and hot tub surfaces.
• Shock the water once a month or when draining and refilling — less frequent shocking than after every use.

For hot tub owners, keeping water sanitized can mean monitoring chlorine and shocking the water regularly. FROG @ease brings mineral sanitizing and SmartChlor together in an in-line system, with a replacement chlorine cartridge for routine use. It is intended for compatible hot tubs, rather than as a standalone cartridge for any spa.

Which hot tubs are compatible with this cartridge?

Use it only with compatible in-line systems in the listed hot tub models and capacities. Supported models include Artesian Elite and Artesian Island; Artesian Island Elite and South Seas when the option is available; Marquis Crown, with Marquis Elite, Vector and Celebrity as optional models; Caldera Vacanza; and Hot Spring Hot Spot. It also fits hot tubs up to 600 gallons.

• Model compatibility is specific to the hot tub’s in-line system.
• The Artesian Island Elite, South Seas, Marquis Elite, Vector and Celebrity options are optional.

Does the SmartChlor cartridge work on its own?

No. The FROG @ease In-Line SmartChlor Replacement Cartridge is designed to be used with a FROG @ease In-Line Mineral Cartridge. Both cartridges are prefilled, and together the system pairs the FROG mineral formula with patented SmartChlor technology. The minerals remove contaminants, while SmartChlor self-regulates to maintain a consistent, low free chlorine level.

• The system combines two sanitizing approaches.
• The prefilled cartridges avoid measuring during setup.

How often does the water need shocking?

With the FROG @ease In-Line System, shock the hot tub once a month or when draining and refilling it. The system uses up to 75% less chlorine than traditional chlorine routines and is designed to make water softer and odor-free, while being easier on skin, hair, swimsuits and hot tub surfaces. The lower shock frequency can also reduce time spent on upkeep and the need for frequent shock treatments.

• SmartChlor maintains a consistent, low free chlorine level.
• Monthly shocking replaces shocking after every use.

This replacement three-pack suits owners of compatible hot tubs who want a prefilled in-line chlorine cartridge used alongside FROG minerals and a less frequent shocking schedule. Its compatibility is limited to the supported models and hot tubs up to 600 gallons.