Keep your hot tub clean and healthy with the HOTSPRING HOTUB SPA Mineral Ion Cartridge Filter Stick. This high-quality cartridge filter is designed specifically for hot tubs and spas, ensuring that your pool is free from dirt, debris, and other contaminants. The yellow cartridge filter fits perfectly in the HOTSPRING HOTUB SPA model and is suitable for use in hot tubs. The HOTSPRING HOTUB SPA Mineral Ion Cartridge Filter Stick is a must-have for any hot tub owner who wants to keep their pool clean and healthy. With its easy-to-install design and high-quality construction, this cartridge filter is the perfect solution for keeping your hot tub clean and free from contaminants. So why wait? Add the HOTSPRING HOTUB SPA Mineral Ion Cartridge Filter Stick to your pool equipment today and enjoy a clean and healthy hot tub experience.