Bluelab pH 4.0 Calibration Solution Commercial Humidifier Emits the bluish and green

Emits the bluish and green regions of the light spectrum

Get professional results for novice and expert growers alike

Ideal for point source applications that introduce organic and synthetic fertilizers

We recommend using a Titan Controls Eos 1 with this product

Each stake is 4 in x 5/8 in

Bluelab pH 4.0 Calibration Solution Commercial Humidifier Emits the bluish and greenpH 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."