Review on Ade Advanced Optics AAOSAL-B: Precision Sea Water Salinity Refractometer for Aquarium - Automatic Temperature Compensation, Dual Scale Hydrometer, Black by Doug Hook
Accuracy issues.
After salinity calibration 0.004 off. Took lfs and recalibrated with the same results. The water is tested at 1.026 and this device reads 1.030, too far to rely on. I recommend buying a better device.
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