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

28" unbreakable wand and shut-off valve for excellent reach

penetrating deeper into the plant foliage

By growers

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.