Hanna pH4 Calibration Solutions -- 16 oz Ceramic MH Bulbs (CMH) One CANNA COCO Brick makes

One CANNA COCO Brick makes 20 liters of coco medium

Why is measuring conductivity vital to the success of your crop

Use in conjunction with VPS Grow and Flower throughout a plant's entire life cycle

the Harvest Bucket is designed to be easily stored and moved around your home or grow space

Hanna pH4 Calibration Solutions -- 16 oz Ceramic MH Bulbs (CMH) One CANNA COCO Brick makesHanna's buffer solutions are made from established formulas and are standardized with a pH meter calibrated to NBS NIST primary standard buffer solutions. Now the pH 4 buffers carry lot # and expiry date as well as pH C chart on every bottle. HI 7004L C and HI 8004L C are also supplied with an analysis certificate. Hanna pH 4 buffers contain potassium hydrogen phthalate. They are standardized using a pH meter calibrated by primary standard buffer