Neptune Systems Probe Calibration Kit - ph 7.0, ph 10.0, & Salinity 53000uS. The Neptune Systems Probe Calibration Kit includes everything you need to calibrate your pH probe and salinity probe for reef tank conditions. The kit features single-use packets which simplify calibration procedures, ensuring accuracy with quality ingredients. It includes packets of 7.0pH, 10.0pH, and 53000µs Salinity Probe calibration solutions.
