Hanna GroLine HI98115 Hydroponics pH Tester Coco's A vents or any other device

vents or any other device that accepts a 0-10 volt input

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Studies have shown that properly vacuum sealed food can stay fresh up to 5x longer

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Hanna GroLine HI98115 Hydroponics pH Tester Coco's A vents or any other deviceThe HI98115 is a GroLine pH tester with advanced features for the measurement of pH in hydroponic nutrient solutions. The HI98115 is a very simple meter to operate with all functions including turning on off and calibration are performed with a single button. The HI98115 features a replaceable HI1271 pH electrode that can be changed when needed without having to buy a new meter. The HI98115 is supplied complete with a carrying case and calibration