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Shark PRO NANO 320 Internal Filter

The Blue Hue Magnetic Phosphate Checker HI713 by Hanna Instruments is a handheld digital colorimeter for measuring low-range phosphate (0.00 to 2.50 ppm). It uses a fixed-wavelength LED and silicon photodetector for professional-grade accuracy without color-chart matching.

Price: $44.99 USD

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