HOW TO USE: Cultivation Nation® pH UP raises the pH of nutrient solutions. An ideal pH range for growing plants is 5.6 – 6.8. Cover cap vent and shake well before use. Take a pH reading of the nutrient solution. Based on your pH reading, adjust the pH by adding small amounts of pH UP at a time, testing for pH again after each application. Continue until the desired pH is reached. CAUTION: Contains potassium hydroxide. Only add pH UP directly to water or nutrient solution. See product label for detailed precautionary and first aid information. 1 Pint