FreshWater Salt Test Strips | Salt Level Testing

FreshWater Salt Test Strips are the dedicated dip test for measuring salt concentration in spas equipped with the FreshWater Salt System or the older Hot Spring ACE Salt Water Sanitizing System. A single 10-second dip tells you whether your spa is in the proper salt range — usually the single most important reading on a saltwater spa.

Salt is the fuel your spa's titanium cartridge uses to generate chlorine. Too little salt, and the cartridge can't produce enough chlorine to sanitize the water — even if the cartridge itself is brand new. Too much salt, and you're forcing the system to work harder than needed, accelerating cartridge wear and risking corrosion on metal components. The target range is 1,500–2,000 ppm, with an ideal target of 1,750 ppm.

Regular salt testing matters more than most owners realize. Salt isn't consumed by the chlorine-generation process — but it leaves the spa anyway through splash-out, water top-offs, and drag-out on swimsuits and towels. The longer you go without testing, the more likely your salt level has drifted out of range without any visible sign in the water.

This bottle contains 25 individually accessed strips sealed in a moisture-resistant flip-top container — about six months of weekly testing, or three months if you test before every soak.