Hanna 1413 μS/cm (EC) Calibration Solution, 20 ml, case of 25 spl_jondon • Use High Altitude model

• Use High Altitude model at 4500 ft elevation or above

Growcubes are difficult to overwater if the container has good drainage

this unique formula will assist in the highest level of crop performance during their critical blooming stage

Humboldt Nutrients Grow Natural is an ultra-concentrated natural grow formula designed to give your plants the nutrient-rich foundations needed during the vegetation and flowering period

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Hanna 1413 μS/cm (EC) Calibration Solution, 20 ml, case of 25 spl_jondon • Use High Altitude modelHanna Instruments' calibration solution, ideal for gardening, laboratory work, and field experiments. Comes in a bottle designed to keep air and light from damaging the solution.