The protective cap on the Redox/pH probe Ive just purchased does not contain liquid, and salt crystals can be seen on the probe. Is the probe still good?
No. The liquid normally contained in the protective cap is a saline solution that is used to keep the electrode hydrated. When the liquid dries, it forms salt crystals that deposit onto the probe, but this does not indicate a malfunction. Simply immerse the probe in the aquarium for at least 48 hours to rehydrate it adequately and then proceed with calibration. How do I calibrate my temperature probe? Does it even need to be calibrated? The temperature sensor is given a standard calibration at the factory and does not need further calibration. In any case, it can be calibrated to correspond to the other temperature sensors in the aquarium if comparable results are desired. Simply set the temperature value measured by the other sensor as the reference temperature.
