Short answer: AquaChek’s 7-way strips read pH, chlorine, bromine, alkalinity, hardness, and cyanuric acid from one dip, in 15 seconds. A bottle holds 100 strips. They suit any plunge or spa sanitized with chlorine or bromine.
Which readings matter for a plunge?
pH and your sanitizer level (free chlorine or bromine) are the ones you’ll check most. Alkalinity helps hold pH steady. Your tub maker’s manual gives the target ranges; use those. Reading Water Test Strips walks through each pad.
How often?
AquaChek’s listing says to test at least twice a week. At that rate, 100 strips last about a year, our arithmetic.
What it doesn’t cover
If your tub uses only ozone or another system without chlorine or bromine, follow its maker’s testing instructions. Some brands, like Renu with its Sirona strips, sell strips matched to their own water care.
Bottom line: a simple, well-known strip for chlorine or bromine tubs. Amazon sets the price. See Cold Plunge Water Maintenance.
