Hanna pH 7.01 Calibration Solution, 20 ml, case of 25 Promote 175 Watt probe start lamp

175 Watt probe start lamp

This single shelf is used to add or replace a shelf in the Vertical Grow Shelf system

comprehensive gardener's tool in powder form

the other for Calibration

Alaskan humus

Hanna pH 7.01 Calibration Solution, 20 ml, case of 25 Promote 175 Watt probe start lamppH 7 is the most frequently used pH buffer. All Hanna solution bottles come with a pH vs. temperature chart together with the production lot # and expiration date to guarantee maximum accuracy. Formulation Hanna pH buffers are made of potassium dihydrogen phosphate and disodium hydrogen phosphate and are standardized with a pH meter calibrated to NIST primary standard buffer solutions (NIST 186Ie & 186IIe and NIST 158g S. R. M.).