Jack Harer
Well-Known Member
If the pH of the soil is right, you don't NEED pH up or down. I don't care if your watering/nutrient solution is 8.5, the soil will buffer that to 6.8. Now if the pH of your water is that high, it might be a good idea to adjust it down so as not to maybe shock the roots. If you do need a pH down (you wont need UP I assure you) go to an aquarium store and get some pH down. Anything safe for fish is safe for plants. You can also use lemon juice, vinegar, or the like to adjust the water pH, but I never worry about it. My water from the tap is around 7 or 7.2.