Bluelab Replacement pH Probe Growing Media Do the touch test:

Do the touch test:

We can’t see whether microbes have actually been removed or are happily living in place

Long-format design for mixing and measuring nutrient reservoirs simultaneously

multi-layer

hand trimmed product

Bluelab Replacement pH Probe Growing Media Do the touch test:Product Features Benefits The Blue lab pH Probe is a replacement pH probe suitable for use with Blue lab products that test the pH value of a solution. 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. The Blue lab pH Probe has a Double Junction Reference which provides a longer life than many other