Hanna pH4 Calibration Solutions -- 16 oz Cal Mag Additives Heavy 16 Roots root growth

Heavy 16 Roots root growth enhancer for a stronger rhizosphere

The result of months of scientific research and trials is Grodan Gro-Blocks Improved with our Advanced Wetting Agent

A shipment going out to a wholesale customer wants every packet sealed on arrival rather than half-spent from a warehouse

Recognized for its quality and widespread use

UL 8800 compliance

Hanna pH4 Calibration Solutions -- 16 oz Cal Mag Additives Heavy 16 Roots root growthHanna'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