Unicel C-4305 Filter Cartridge Brand_Jack's Magic Each container contains about 11-12

Each container contains about 11-12 cups of product

Spa Stain & Scale works without the use of phosphates or harsh acids

surfactants

and salt water sanitizing systems

Unicel C-4305 Filter Cartridge Brand_Jack's Magic Each container contains about 11-12Unicel filter cartridges are simply the finest replacement filters you can buy for your pool or spa, being made of the finest materials to meet or exceed OEM filters. Its heavy duty polyester is designed to last far longer than cheaper alternatives, while having more pleats to improve filtering capacity. Best of all, Unicel filters are made right here in the USA for the highest possible quality, allowing you to buy with confidence.