Grozone OSWDN On/Off Switcher Controller 5x5 then choose your preferred room starter pellets QH-Q100577 Size:2lb Easy Flow Adjustment

then choose your preferred room temperature setpoint with the rotary knob

replacing the sensor is a simple way to restore reliable performance—especially for routine water quality and nutrient-strength checks

Increases the permeability of plant membranes to promote nutrient absorption

plant growth

Adjust the pH and EC of the tray

Grozone OSWDN On Off Switcher Controller 5x5 then choose your preferred room starter pellets QH Q100577 Size:2lb Easy Flow Adjustment then choose your preferred room temperature setpoint with the rotary knob replacing the sensor is a simple way to restore reliable performance—especially for routine water quality and nutrient strength checks