Bluelab pH 7.0 Calibration Solution Size:250 ml These trays have been specifically

These trays have been specifically engineered to allow for just the right amount of water to enter the growing medium

which causes the insect to stop eating

This revolutionary filter will keep your air-cooled reflectors

Nutrients found in Grow A & B are balanced

This unique formulation of highly purified minerals and natural additives combines the benefits of both organic and soilless gardening methods

Bluelab pH 7.0 Calibration Solution Size:250 ml These trays have been specificallypH 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.