Keep electronic aquarium pH measurement accurate with routine calibration. pH Calibration Fluid for Neptune Systems AquaController Apex pH Probes provides standardized reference points to ensure consistent and accurate test results. Calibrate pH probes on your Apex Kit or your Apex Jr Kit, Apex Lite Kit, customized with an optional Neptune Systems AquaController Apex pH Probe.
Choose the calibration solution based on the pH range your pH probe is expected to read.
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Please click "More Information" for Apex pH Probe Calibration guide.