Bluelab pH 7.0 Calibration Solution CLAY Premium European DE lamp features:

Premium European DE lamp features:

Power indicator

With a mix of fertilizers like alfalfa

Always check pH and CF levels

Bluelab pH 7.0 Calibration Solution CLAY Premium European DE lamp features:Bluelab pH 7. 0 Calibration Solution ensures pH measuring equipment is 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 and with the lids securely tightened. Case of 6 Bottles Each bottle contains 500 ml 16. 9 fl oz Bluelab pH Pen Cleaning Instructions