Here are a few pics. I started flower on the plants in question on 8-31. I have only added nutrients 2x in 5 weeks(General Hydroponics Flora Bloom). I figured I had a water problem and a ph problem. I picked up a reverse osmosis system to address my water problem(ph of water is 7.8, and a new ph meter(exctech ph100). I flushed these plants with 5 gallons of pure R/O water and they are in 3 gallon pots. The yellowing is getting worse. I can never get the same ph reading ever, all the plants are different but it is between 6.5 and 7.0 on all the plants as far as I can tell. I check the first trickles of water, and the last few trickles after I water with 1 gallon or more of water. Here are some pics maybe someone can lead me in the right direction. I rinsed 5 gallons of pure R/O water yesterday, and today the plants seemed worse. I am getting concerned, its seems to me I am still having ph problems. What is the best possible way to get my soil ph perfect? I am seeing all the color from my green plans, turn a sickly yellow, and the brown spots, and burning crispy looking dead leaves.