Our Monarch® CD Ozone System mixes concentrated ozone bubbles into the water to neutralize contaminants. When used in conjunction with the @ease SmartChlor® Cartridge, you’ll get our most effective water care system. As an option for virtually chlorine-free water care, combine the CD Ozone System with Monarch Silver Cartridges and MPS non-chlorine oxidizers instead of the @ease cartridge. The CD Ozone System is standard on Caldera Utopia® models, and optional on Paradise® and Vacanza® models.

Get PricingApply for Financing

MPS Non-Chlorine Oxidizer

MPS is a non-chlorine oxidizer used with the Monarch CD ozone system and Monarch Silver Cartridge to help maintain sparkling clean water in your Caldera® hot tub.

Monarch Silver Cartridge

The use of silver ions inhibits the growth of bacteria and reduces daily spa water care for naturally fresh water. This solution for hot tub chemicals saves time and maintains water quality.

Monarch MPS Plus®

Monarch MPS Plus is a non-chlorine oxidizer with aromatherapy. It helps keep spa water crystal clear, and enhances your hot tub experience with pleasing scents, all in one convenient product.

MPS Test Strips

Use these test strips to monitor your spa’s MPS, pH, and alkalinity levels when using the MPS chlorine-free oxidizer.

5 Mistakes Mockup Guide

Top 5 Hot Tub Buying Mistakes & How to Avoid Them

Hot tubs are an investment in your health, happiness, and recreation. Coming from the experts, there is a lot to know about hot tubs. Look at our guide to learn what it is that you should avoid when considering a hot tub!

Want More? Try These

Water Care Systems Caldera FROG Water Care

The FROG @ease In-Line System with SmartChlor® Technology automatically maintains clean water with pre-filled cartridges to eliminate the guesswork and combine chlorine and minerals for self-regulating sanitization.

Spa Steps Hot Spring Everwood HD Steps

This premium 32” step is an enhanced version of our industry-leading Everwood step, specifically designed to match the new Hot Spring Everwood HD cabinet.

Entertainment Systems In-Home Wireless Dock

With our In-Home Wireless Dock, you can connect with virtually any audio source you choose: iPod®, iPhone®, MP3 player, satellite/AM/FM radio, CD/DVD player to instantly transmit to your spa.

Get Pricing from Mainely Tubs