General Hydroponics pH 7.01 Calibration Solution gavita 5 mL) per gallon (4

5 mL) per gallon (4 L) of water

The fan blade is made of chemical-resistant polypropylene

Tailored for All Growth StagesIdeal from early vegetative growth through to late flower

Eco 100 and Eco 132

Works seamlessly with any nutrient program

General Hydroponics pH 7.01 Calibration Solution gavita 5 mL) per gallon (4General Hydroponics uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.