Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 water-pumps-&-irrigation-supplies It provides support for beneficial

It provides support for beneficial soil microbes to enhance vigorous roots and plants and is OMRI AND OIM certified

Maximize your lighting setup without adding more lamps or additional heat sources

first offered by Hydro-Organics in 1996

Works with many bulb brands & sizes

Components

Hanna pH 4.01 Calibration Solution, 20 ml, case of 25 water-pumps-&-irrigation-supplies It provides support for beneficialHanna'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