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pH-Up 0-0-8 is a Dyna-Gro product used to raise the pH of water.
What is pH?
Before adding the nutrient solution:
Using a pH meter to measure the acidity or alkalinity of the water. If the pH is LOWER than 6.0 (5.5 for hydroponics), add pH DOWN to nutrient solution in ½ tsp. per gallon increments until desired pH is achieved.