I need to LOWER my PH fast. Like yesterday. I just got back today after being gone for 3 days and I noticed that the Leaves on top of my plants ( I'm in week 5 of flowering) are turning yellow and twisting. I looked it up in my book and found out it was my PH. I tested it and it's at 8.5, I can't get to any hydro store until Tuesday 3rd. What can i get from a dollar store or WALMART that will work? What can I do?
lemon juice or vinegar. i'd recommend a full res change though, depending on last time u did it. when you mix ur nutes it will be a lower ph and will balance out because ur root ball ph will still be high.