Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 lighting-&-electrical-components 100 gallon conical bottom tank

100 gallon conical bottom tank

square-wave digital ballast designed specifically for the 315W high intensity ceramic halide lamp

Hydroponics: Mix 2 ml per gallon in non-chlorinated water

and Quillaja (Soap Bark)

Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 lighting-&-electrical-components 100 gallon conical bottom tankHanna's Buffer solutions are made from established formulas and are standardized with a pH meter that is calibrated to NBS NIST primary standard buffer solutions. The 20 ml sachets are ideal for infrequent calibrations while for heavy duty applications, you can choose from the popular 230 ml, 1 liter, or 1 gallon containers. Now the pH 4 buffers carry lot #, expiry date as well as pH C chart on every bottle. HI 7004L C and HI 8004L C are also supplied