Bluelab pH 4.0 Calibration Solution 500ml Nutirents and Growing Media and control risk of root

and control risk of root infections

For best results with these Macroplugs always insert them in the GRODAN Gro-Smart tray

VeloKelp can be used as an additive or foliar spray

as well as algae and mildew removers

Non stick blades

Bluelab pH 4.0 Calibration Solution 500ml Nutirents and Growing Media and control risk of rootBluelab 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.