OBMAO Spa Mineral Stick/Hot Tub Stick Ag+ Filter Silver Ion Cartridge with 4 Months Lifetime Universal for Hot Tub,Keep Water Clear(Grey,4PCS)

OBMAO Hot Tub Stick Silver Ion Cartridge Specifications: Capacity: Up to 500 gallons/2000L. Materials : The hot tub mineral stick contains 6 types of natural mineral balls. Lifetime: Four months,minimum 4 hours daily. Flow Rate: Works with all spa flow rates. Fuction:The mineral sticks for hot tub can significantly improve the look and feel of the water,ensuring that the odor-free spa brings you clear water. Wide Application: The spa mineral stick silver ion cartridge is designed to fit most spa&hot tub filters and is compatible with most spa maintenance products. The minimum required length for spa hot tub filter mineral rod components is approximately 6.9 inches with a minimum filter hole diameter of 1.8 inches.