Natural Spa Experience: This nature 2 stick for hot tub can automatically add trace minerals to the water, reducing impurities in the water to create clearer and cleaner water, making you feel as fortable as you are in a pure natural hot spring! Safe and Healthy: Our mineral sticks for hot tub are made of premium ABS plastic, strong,odorless, SAFE and mineral features strong adsorption capacity, effectively removes chlorine and fluoride, heavy metals, odors and other deposits to provide soft and healthy water. Easy to Use: This hot tub foam eliminator is very easy to use and install, Just take secends to drop the spa mineral stick into your existing filter and the hot tub stick will work. Wide Application: This in-Filter Mineral Sticks Parts Cartridge Stick fits for Most Spas and Hot Tubs, is ideal for outdoor swimming pools, hot spring pools, baths, spa pools, plunge pools, and many more. High Cost-effective Products：Our Mineral Sticks for Spas up to 500 Gallons/2000L,low cost and and no maintenance costs with a duration up to 4-6 months,You can enjoy a carefree spa experience for a long time after installation!