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side dressing
For best results with these Macroplugs always insert them in the GRODAN Gro-Smart tray
as well as algae and mildew removers
and Japanese Beetles
Bluelab pH 4.0 Calibration Solution 500ml Nutirents and Growing Media side dressingBluelab 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.
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