Hanna Instruments-981420 GroLine monitor

Make your nutrient solution easy to manage with the GroLine Monitor and combined pH/EC/Temperature probe. Quick to setup and simple to use, the monitor was designed for hydroponics, aquaponics, and greenhouses.

Benefits include:

• High and low alarms with LED indicator


• Easy viewing on the large LCD with plant-safe green backlighting


• Calibrate pH and EC with a single Quick Cal solution

Giving growers the green light!

The revolutionary Hanna Instruments-981420 GroLine monitor emits just the right amount of green light from its screen so not to disturb the seedlings' natural growing cycles.

The benefits of having a gentle green glow:

• Works alongside favoured red and blue lighting systems


• Does not disturb the plants' 'night sleep' cycle


• Natural growth regulator


• Can repress the growth of algae and fungus