C+ Cassettes use our patented technology to test your water’s chemistry daily and provides our most accurate chemical, pump and temperature readings.

• 5 months of measurements: 2 C2+ Cassettes measures FC and pH only, and 1 C5+ Cassette measures FC, pH, TA, CH and CYA
• 10% longer life from 29 days to 32 days for extra “measure now” readings
• Measurements are not averaged, allowing for better chemical balancing
• Customizable temperature alerts to know the temperature is right or if the pool heater may have been left on.