Bluelab pH 4.0 Calibration Solution METERS cationic nutrients or metals in

cationic nutrients or metals in a growing environment

Clonex Rooting Gel is a high performance

Featuring 100% Australian Granulated carbon

Boveda is good for any humidity sensitive product

Impeller Material: Techno polymer

Bluelab pH 4.0 Calibration Solution METERS cationic nutrients or metals inBluelab pH 4. 0 Calibration Solution ensures your 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