GroLine Waterproof Portable pH/EC/TDS Meter with Calibration Solution(25 x 20 mL sachets) aquarium CO2 ORP Range: ± 1000mV

ORP Range: ± 1000mV

000-gallon capacity or 6-month filter life

The Milwaukee MA861 is a professional-grade replacement membrane kit designed for the MA860 Galvanic Dissolved Oxygen Probe used with the MW605 MAX Dissolved Oxygen Meter

5V AA alkaline (included)

GroLine Waterproof Portable pH/EC/TDS Meter with Calibration Solution(25 x 20 mL sachets) aquarium CO2 ORP Range: ± 1000mVOne of the best meters for hydroponics, our GroLine Waterproof Portable pH EC TDS Meter (HI9814) is a must have for growers. Easily manage and monitor your growing nutrients with this customer favorite. Be up in running in no time! This meter arrives with everything you need for successful testing right out of the box. Whether you're a commercial or at home grower, testing nutrients is easy with Hanna by your side. Verify nutrient results on the spot