All Caldera spa models come standard with the Frog® @ease In-Line System with SmartChlor® Technology. This inline-water care is a two cartridge system that includes a chlorine or bromine cartridge and a mineral cartridge. This in-line system makes it easy to maintain the water sanitation with minimal added chemicals. This video shows you where you’ll add the liquid or granules in the spa when it is time to shock the spa water or add chemicals. The type of chemicals you add will vary depending on the hot tub sanitizer you choose. To add chemicals to your hot tub, follow these steps: 1) Unlock your hot tub cover straps and fully open the spa cover 2) Depending on your hot tub model, open the spa filter lid or basket 3) Using the hot tub control panel, start the clean cycle 4) Carefully measure the recommended amount of granular or liquid spa chemicals 5) Pour the hot tub chemicals into the water above the filter 6) Once the hot tub cleaning cycle finishes, wait an additional ten minutes to allow for chemicals to dissipate before closing the hot tub filter cover, closing up or using your spa. FOR SAFETY, NEVER LEAVE YOUR HOT TUB UNATTENDED WHEN THE COVER IS REMOVED OR OPEN 7) After the ten minutes, return the hot tub filter lid or basket, close the cover and lock the straps.