Clear Comfort CCW25 Patented Hydroxyl-Based AOP For Portable Spa, Swim Spa, Plunge Pool & Personal Hot Tub Sanitation. Patented Hydroxyl-Based AOP For Portable Spa, Swim Spa, Plunge Pool & Personal Hot Tub Sanitation. The Clear Comfort CCW25. AOP portable spa & swim spa system delivers the easiest way to get the best, healthiest & freshest-feeling water with drinking-water chlorine levels. Powered by our patented Hydroxyl-Based AOP Technology. WATER TREATMENT SYSTEM FEATURES Is the CCW25 AOP system right for me? Take a closer look at the award-winning Clear Comfort CCW25 AOP system for portable spas, swim spas, plunge pools, and personal hot tubs. CARTRIDGE REPLACEMENT Enjoy system maintenance that only requires less than 1 minute every year EASY ACCESSORY INTEGRATION? Designed to easily integrate your flow meter & accessory pump to your spa’s needs. Sit back & soak in the best water available. With Clear Comfort’s low-chemical water treatment system, you’ll notice the soft feeling of clean, clear water and the revitalizing difference on your skin, eyes, and hair. Without the negative effects of. You’ll be able to breathe deeply without the heavy scent of chlorine. Designed for easy spa & swim spa ownership? Experience the best full-flow water treatment available in a flexible design that’s easily integrated, use and enjoy. The CCW25 guards the health and wellness of you and your spa.