Oakton 1413 microsiemens/cm Conductivity Standard Solution, 500 ml refurbished-products but shifted ratios on the

but shifted ratios on the NPK to allow for the 2-4 week vegetation time that indoor growers are accustomed too (versus the 2-3 month outdoor vegetation time)

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OK-35624-29 for pHTestr 2

PhysioSpec Greenhouse offers a world-class work and research environment with vivid colors and greater contrast to study the health of your crop

Oakton 1413 microsiemens/cm Conductivity Standard Solution, 500 ml refurbished-products but shifted ratios on theStandards have KCl, NaCl and 442 conversions printed on the bottle for ease of use. Temperature corrections are printed on the bottle, with the certified values listed in the tables, accurate to within 0. 5% and are referenced to 25C.