Bluelab - pH Probe KCl Storage Solution net cup you are probably looking for

you are probably looking for vermiculite

for example

Mixing Rate:

or even in tents

CO2 supplementation and elevated nutrient levels

Bluelab - pH Probe KCl Storage Solution net cup you are probably looking forThe perfect solution to store and hydrate your Bluelab pH probes or pens. Bluelab pH Probe KCl Storage Solution is made specifically for use with BluelabpH Probes and Pens. It is designed to increase response time and maximize the life of Bluelab pH Probes and Pens. Add KCl solution to the cap of the pH pen probe for storage, after use and hydrate in KCl solution monthly. Instructions are on the label of the bottle. Bluelab pH Probe KCl Storage