Ph Level High Need Advice

Hey my PH level was about 7.5-8.2 so i decreased it around 5.6-6.5...Could the high PH level be makeing my plants turn yellow ..Also how long do you think it would take to regenarate from the yellow..Also its soil using floro's havent introduced fert yet.. so any advice would to what i could do will help greatly

I suggest waiting at least 1 week after any attempt to correct problems. It should be long enough to notice changes. It is also a good idea to leave one plant untreated so that you have a comparison. If you identify the problem correctly than you can begin treating the plant you left out.