The PinPoint is ok, but I prefer the refractometer. The Pinpoint still requires calibration and needs a 53ms solution standard to calibrate. I got messed up once when the standard I bought was way off throwing off the calibration of the monitor. I found the Pinpoint to be very sensitive to stray voltage, pretty much have to take the sample away from the tank or the lights, pump causing the display to jump around.
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-=Bryan=-
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