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It is essential when growing with a hydroponic solution to KNOW what the strength of the solution is..
$140.00
Calibration and conductivity standard solutions... a must in every grower's toolbox. The Bluelab ca..
$8.16
Calibration and conductivity standard solutions... a must in every grower's toolbox. The Bluelab ca..
$10.99
Calibration and conductivity standard solutions... a must in every grower's toolbox. The Bluelab ca..
$8.16
Calibration and conductivity standard solutions... a must in every grower's toolbox. The Bluelab ca..
$10.99
Easy to clean because of its bullet shaped glass bulb. Fully waterproof and less fragile than all-gl..
$70.00