Neptune Systems Calibration Fluid - 10.0
Manufacturer: Neptune Systems
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Calibration is the key to attaining accurate readings from your aquarium monitors and probes, and even the most accurate probes can lose their calibration over a few months. Neptune System's 10.0 pH calibration packet is quick and easy: simple remove the top, stick your probe in, and perform the calibration procedure. Packet contains enough for a single calibration.