Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter spl_ps It is perfect for use

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

• Eliminate the need for caustic chemicals like peroxide or bleaches to clean reservoirs

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

The EcoPlus Elite Series Electronic Multistage Pump is perfect for supplying water to domestic

The calibration buffers are automatically recognized and after calibration the buffer values used are shown on the display as a tag

Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter spl_ps It is perfect for useEasy 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