PurGro GroBot pH Probe, Industrial Replacement growing-accessories and organic nutrients

and organic nutrients

Ideal as an additive for organic tea mixtures

Cost a few bucks more

The Apron is made of a waxed cotton canvas that keeps particles from sticking

or wasting valuable electronic resources running cooling fans or other unwanted devices

PurGro GroBot pH Probe, Industrial Replacement growing-accessories and organic nutrientsThese don't look like the ones from the hydro store because they are double junction, flat surface pH probes typically used in chemical plants for process control. They last longer, stay cleaner and are built to mount in line inside your GroBot Evolution. Cost a few bucks more, but these are the good ones. Proudly made in the USA.