Dyna-Gro SUPERthrive pH-Up - 1 QuartDescription SUPERthrive pH Up 1 qt SUPERthrive pH Up 1 qt: SUPERthrive pH Up 0 0 8 is used to lower the pH level of your nutrient solutions and water. What is pH Up? What is pH Up?: pH is a measure of acidity or alkalinity. For growing in soil, the pH range should be 6. 0 to 6. 5. In hydroponics, pH should be maintained between 5. 5 and 6. 0 When the proper pH is achieved, the nutrients become more available to the plant. pH levels that are too low or