Bluelab pH 4.0 Calibration Solution 500 ml Great White 25 ft length silver/black ducting

25 ft length silver/black ducting packaged in an attractive box

Application: Administer to nutrient solution from early on in the vegetative stage throughout the third week of flowering

Oasis Cubes

Water each plant with 1/2 L (1/2 qt) of the mixture when you see new growth starting

Bluelab pH 4.0 Calibration Solution 500 ml Great White 25 ft length silver/black ductingpH 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 Solutions should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened