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Want to know how to calibrate a probe? While every type of aquarium monitor is unique, a pH monitor is a good example. The pH probe is sensitive and changes measurement over time. pH calibration solution is used to reorient the monitor to measure accurately. To calibrate a pH probe, place the probe in calibration solution. Then, follow the monitor instructions. A pH probe must stay moist. When not using the monitor, use pH meter probe storage solution to preserve the probe. Even with proper care, a pH probe should be changed at least every 1-2 years.

Marine Depot also has ORP meter calibration solution and conductivity calibration solution.


Hanna Instruments Calcium Reagent, 25 Tests
American Marine Pinpoint ORP / REDOX Calibration Fluid 400mV
Deionized Water (230mL) - Hanna Instruments
American Marine Pinpoint Salinity Calibration Fluid


Hanna Instruments Iron Reagents - 25 Tests
American Marine Pinpoint ORP/REDOX Calibration Fluid 400mV - 5 Pack
American Marine Pinpoint Electrode Storage Fluid 60 ml


HM Digital pH Buffer Solution