Hanna pH 7.01 Calibration Solution, 20 ml, case of 25 spl_hrg store and use as needed

store and use as needed

Rockwool's high water holding capacity will enable you to go on vacation without worrying about your plants drying out

Fluence Suspension Kit for RAY 22/44/66

- Low maintenance

Hanna pH 7.01 Calibration Solution, 20 ml, case of 25 spl_hrg store and use as neededpH 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.).