Easy to Use and Long Lifetime:Just simply drop the spa mineral stick into your existing device and let the hot tub stick do their work.The spa stick can work continuously for four months. Efficient Purification Effect:The spa minerals for hot tub can significantly improve the look and feel of the water, ensuring that the odor-free spa brings you clear water. PREMIUM MATERIAL: This hot tub mineral stick is made of healthy ABS plastic and natural minerals. Put it in the pool, it can keep the water fresh and clean for a long time, and enjoy healthy spa treatment at all times. Suitable for Most Spas and Hot Tubs: Perfect for jacuzzi, alcove bathtub, walk-in bathtub, whirlpool bathtub, hot tub boat and most easy-to-use standard bathtubs, just a few seconds installation. Spa Mineral Stick Specifications: Capacity: Up to 500 gallons. Lifetime: Four months,minimum 4 hours daily. Flow rate: Works with all spa flow rates. Installation: Drops into the core of most spa sticks, works with suction-side and pressure-side stick. Fuction:This spa mineral stick can significantly improve the look and feel of the water, ensuring that the odor-free spa brings you clear water. Wide application: The hot tub stick is perfect for jacuzzi, alcove bathtub, walk-in bathtub, whirlpool bathtub, hot tub boat and most easy-to-use standard bathtubs, just a few seconds installation. spa mineral stick hot tub stick Easy to install The spa mineral stick is not affected by heat and can be installed at your existing flow rate. Just put the spa stick into the existing filter and let the new stick work. Natural mineral Assures an odor-free spa,improves performance of spas,bring you crystal clear,clean and fresh smelling water without harmful chemicals.