Well since the beginning of my grow my soil has been keeping a ph of about 7.8-8. I'll add ph down to my waterings and over a couple days its back to 8. I'm going to try buying a better soil ph tester to see if thats the problem. Weird bc my plants look great and have been growing fast. I started flowering today so hopefully I get good buds. My next white widows are going into coco so I can control ph and nutrients more closely. im switching to organic apple cider vinegar to lower ph now. how much should I be adding to each gallon of water to lower the ph a point.