Freshwater™ XL Vanishing Act Calcium Remover for Hot Tubs and Spas Freeflow Filter The blue mineral cartridge lasts

The blue mineral cartridge lasts for 4 months

Sirona™ Bromine Tablets provide a concentrated source of active bromine that is ideal for hot tub sanitizing

Classic FH 1995-1996

The Hot Spring® 30 Sq Ft

The inverse relationship of CYA to FCL is why you want to keep an eye on CYA levels in your hot tub or swim spa

Freshwater™ XL Vanishing Act Calcium Remover for Hot Tubs and Spas Freeflow Filter The blue mineral cartridge lastsThe Freshwater XL Vanishing Act Calcium Remover bag removes excess calcium hardness from hot tub water. In salt systems, the calcium hardness must be between 25 75ppm. Use every time you change your hot tub water. For use with any water care system, including ACE and Freshwater Salt! Did You Know? Use the XL Vanishing Act bag when the calcium hardness level in your fill water is 150ppm or higher.