LONG-TERM USE: Our filters provide 24-hour , easy to install and save costs, last up to 120 days, improve your water quality for a long time, and suitable for most spa equipment and products Good cleaning effect: You get 2 pieces of mineral sticks, which can effectively improve the water quality regardless of the water temperature, no matter it is cold or hot, it achieve good cleaning effect Comfortable Experience: spa mineral cartridge can improve water quality, reduce impurities and other components in the water, allowing you to enjoy a comfortable spa experience Convenient to Use: mineral sticks are not affected by heat, just add them to your favorite water care system for quality spa water, easy to use and save your time and