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ORAPXI pH Salinity Tester 5 in 1 pH Salt TDS EC Temp Meter for Hydroponic System Saltwater Pool pH and PPM Meter Water Tester for Indoor Plant Grow, Hot Tub, Spa, Aquarium, Home Brewing Body Sprays 100% NATURAL BEAUTY FORMULA: WhenBrand: ORAPXI Color: pH,SALT,TDS,EC,TEMP 5 in 1 Features: pH TDS EC Meter for Hydroponics Closely monitor pH and ppm values while growing in plant. Check and adjust pH and EC values in hydroponic nutrient solution to help plant grow. This meter can give accurate readings of water or nutrient solution, keep your planting water pH, TDS and EC right. ORAPXI tester that meets the needs of any serious grower. pH and PPM Meter Suitable for monitoring pH PPM