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You are one step closer to a soothing jet massage!


The FROG integrated water care system makes hot tub water treatment amazingly simple. There’s nothing to measure or pour. Simply dial in your use level on the bromine cartridge and insert it into the integrated housing. Other than testing your water weekly, that’s all you need to do! The FROG system will continually keep your water crystal clear. The system uses fewer chemicals than traditional systems and contains bromine that is gentler on your skin. Treating your hot tub with bromine also eliminates the harsh smell associated with chlorine sanitisers.



FROG Replacement Cartridges

Available only from Caldera Spas dealers, our custom FROG bromine cartridge contains 200 grams of bromine so it lasts longer than standard FROG bromine cartridges and is designed specifically for the water needs of Caldera Spas hot tubs. Replace bromine cartridges monthly to maintain sparkling clear water. (With regular use. Varies by spa size.)

Monarch CD Ozone System

The optional high-output Monarch™ Corona Discharge (CD) ozone system (standard on Utopia and Paradise series models) reduces the need for hot tub chemicals by continuously mixing highly concentrated ozone into the water. This system works efficiently with the FROG inline system, reducing the amount of chemicals required to maintain fresh, clean and clear spa water.