Bluelab pH 4.0 Calibration Solution Commercial Humidifier We recommend using a Titan

We recommend using a Titan Controls Eos 1 with this product

Use Cali Pro Grow A & B during the vegetative stage and Cali Pro Bloom A & B during flowering

Each stake is 4 in x 5/8 in

Ideal for point source applications that introduce organic and synthetic fertilizers

Get professional results for novice and expert growers alike

Bluelab pH 4.0 Calibration Solution Commercial Humidifier We recommend using a TitanpH 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."