Bluelab pH 4.0 Calibration Solution 500ml Meters Easily mounts wherever needed

Easily mounts wherever needed

In systems using reverse osmosis (RO) water and plants grown in inert media

5 inches (240mm) long

on the farm

It is best to always keep the soil slightly moist

Bluelab pH 4.0 Calibration Solution 500ml Meters Easily mounts wherever neededBluelab pH 4. 0 Calibration Solution pH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7. 0 first (buffer) then to pH 4. 0 (slope). Calibration Solution should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened.