Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter rock-bottom Keep the water temperature in

Keep the water temperature in your reservoir between 66 and 75 degrees F

light timer

Light Uniformity – avg/min 2

Absorbable silica is known to strengthen plant cell walls

We take the highest quality coir available

Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter rock-bottom Keep the water temperature inEasy to clean because of its bullet shaped glass bulb. Fully waterproof and less fragile than all glass electrodes because of its tough polypropylene barrel. Gel filled (non refillable) making it maintenance free and a double junction reference providing longer life! Probe Tips All probes are interchangeable between all Bluelab products All probes carry a 6 month warranty Proper hydration of pH probes is vital to maintain wick All pH probes eventually