FROG Serene Hot Tub Replacement Mineral Cartridges, Bromine Cartridges Sealed

The FROG Serene Hot Tub Replacement Mineral Cartridges are bromine cartridges sealed. These mineral sanitizer granules are designed for fresh water types and have a floating feature for easy maintenance. The blue cartridges are made of mineral material and have dimensions of 2 inches in height, length, and width. The Frog brand ensures quality and reliability for your hot tub spa needs. Mineral Cartridge EPA Reg Number: 53735-11 Bromine Cartridge EPA Reg Number: 53735-16