Hi, Those are my plants (Day 38 of flower). I started to notice 2 weeks ago some burns on the tips of my leaves, so i decided to slack off the nutes (picture below of the nutrients). But, things still got worse, the burns started from the bottom leaves and started to appear at the middle leaves. So i though to myself, well maybe its not enough nutrients??? So i gave my plants a normal dose of nutrients the next watering ( i water every 48 hours). But shit just got crazy and bottom leaves were turning hella yellow (i even cut some of them). So a bit desperate, i just gave my plant straight tap water the next watering, BUT ITS EVEN WORSE now. So, i think my soil's ph is wrong. I have been using PH Down so i would have a PH of 6.0 every 2 watering on 3. I still haven't tested my soil run off, i don't know how. Does that look like PH deficiency?
To check the runoff, water your plant and collect the first water to come out the bottom. Then check the pH of it. What medium at you growing in? Ph 6 is kinda low for soil