With this it just takes a glance to check on the pH level. I no longer have to check it with a test kit. It has made it so I can now estimate when pH adjustments need to be made.Works great, stays accurate. I've had it for 2 months plus. I like that you calibrate it with 7 and 10, not just 4 and 7 pH calibration fluid.Buy American Marine PINPOINT pH Monitor + Probe and Calibration Fluid Now

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