Bluelab pH 4.0 Calibration Solution 500ml Pots Double filtration system: filter basket

Double filtration system: filter basket and nozzle filter

Calathea Makoyana 10"- Non-Toxic

XXXTractor 3 Bag Set

Free of any harmful pathogens thanks to a unique heat-treatment sterilization process

nursery pots and planters

Bluelab pH 4.0 Calibration Solution 500ml Pots Double filtration system: filter basketBluelab pH 4. 0 Calibration Solution pH 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.