Bluelab pH 7.0 Calibration Solution Size:250 ml remove the brushes and fill

remove the brushes and fill the container with your preferred cleaning solution

All natural

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

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

Nutrients found in Grow A & B are balanced

Bluelab pH 7.0 Calibration Solution Size:250 ml remove the brushes and fillpH 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.