Efficient Purification Effect: The spa mineral stick ensures crystal clear and odor-free water, dramatically enhancing the spa experience by preventing turbidity and impurities. Enjoy the look and feel of pristine water. Reduce Chemical Use: Crafted from healthy ABS and natural minerals, this hot tub mineral stick minimizes the need for additional chemicals like chlorine or bromine. Experience a gentler spa treatment, reducing skin irritation for a more enjoyable, rejuvenating experience. Exist for High-cost Performance: This spa mineral sticks maintains for up to 4 months with minimal maintenance costs. It can be used in conjunction with your existing filters. Just insert the hot tub stick into the hot tub filter cartridge. You can enjoy a hassle-free spa experience for up to 4 months! Keeps your water clean and PH balanced, thus extending the life of your spa or hot tub. Compatibility: Suitable for various spas and hot tubs, including Jacuzzis, alcove tubs, walk-in tubs, whirlpool tubs, and standard tubs. Achieve quick installation and enjoy a revitalized spa experience. Suitable for spas and hot tubs up to 500 gallons / 2000L Easy to Install: It can be installed at the existing flow rate. Just place the hydrotherapy rod into the existing filter and let the hot tub stick work. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Material: ABS+minerals colour: Yellow Package Contents: 2 x spa mineral stick Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.