FreshWater Ag+ Silver Ion Sanitizer | Hot Tub Type_Pizza Oven Each cartridge provides 50 square

Each cartridge provides 50 square feet

You still need chlorine or MPS for oxidation (more on that below)

Have you tried mixing a few

It does not filter phosphates

Regular use keeps water consistently clear and comfortable

FreshWater Ag+ Silver Ion Sanitizer | Hot Tub Type_Pizza Oven Each cartridge provides 50 squareThe FreshWater Ag+ Silver Ion Sanitizer is a supplemental sanitizing cartridge that slots into your spa's filter standpipe and releases a steady stream of positively charged silver ions into the water for approximately four months. Those silver ions inhibit bacterial growth continuously, meaning you can run your spa on a much lower chlorine residual than a chlorine only spa would require. This is one of the most popular FreshWater products because it