Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter spl_cp height extension kit gives you

height extension kit gives you the ability to increase your growing height from 6'7' to 7'7'

Turn container upside down and tap to loosen soil and roots

and temperature measurements in a single tester

twist and lock

Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter spl_cp height extension kit gives youEasy 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