Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter spl_ps It is made with highly

It is made with highly reflective aluminum and offers wide and bright light delivery

• Highly efficient in overlapping multi-light configurations

It is perfect for use as a reservoir for larger hydroponic systems

• No need for extra wetting agents

Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter spl_ps It is made with highlyEasy 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