A scale measuring the acidity or alkalinity of a solution, ranging 0–14. Cannabis in coco coir is typically fed at pH 5.5–6.2 to ensure optimal nutrient availability.
Dakota confirmed feeding the CO2 room at pH 5.6–5.8 for 100% coco. When mixing 20 L of Cronk nutrient solution for the AutoPot tent hand-watering, the mix came out to a 'perfect 5.8 pH' without needing pH up or down. AutoPot guidelines recommend buffering coco with 2.5 gallons of pH 5.6 water at quarter-strength.
Discussed in: Ep 001