Bluelab Inline pH Probe (Replacement Probe Guardian Monitor In-Line) Hydroponic Systems & Gardens The Right Barrel rotates clockwise

The Right Barrel rotates clockwise

000 GPD pure RO water

Variable speed control compatibility also provides the ability to adjust airflow as needed

per gallon of soil

Bluelab Inline pH Probe (Replacement Probe Guardian Monitor In-Line) Hydroponic Systems & Gardens The Right Barrel rotates clockwiseThe Bluelab Inline pH Probe is a replacement probe for the Guardian Monitor In Line. Unfortunately, pH Probes do not last forever as they age through normal use and will eventually fail. With good care and use (keeping the probe tip wet and cleaning once a month), you will extend its life. Replace only the pH probe, not the whole meter!