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APERA INSTRUMENTS AI209-T Value Series PH20 pH Tester Combo Kit, including the Maintenance Set, and a CalPod Solution Holder for Easy Calibration: Amazon.com: Industrial & Scientific
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Apera Instruments AI209 PH20 Value Waterproof pH Pocket Tester, 0.1 pH Accuracy, 0-14.0 pH Range, Complete Kit - Walmart.com
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APERA INSTRUMENTS AI209-T Value Series PH20 pH Tester Combo Kit, including the Maintenance Set, and a CalPod Solution Holder for Easy Calibration: Amazon.com: Industrial & Scientific
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Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy & AcuRite 00613 Digital Hygrometer & Indoor Thermometer Pre-Calibrated Humidity Gauge, 3" H x 2.5" W x 1.3" D:
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Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy & Botanicare HGC732110 Cal-Mag Plus, A Calcium, Magnesium, and Iron Plant Supplement, Quart: Amazon.com: Industrial & Scientific
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APERA INSTRUMENTS AI209-T Value Series PH20 pH Tester Combo Kit, including the Maintenance Set, and a CalPod Solution Holder for Easy Calibration: Amazon.com: Industrial & Scientific
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