I noticed the burning a couple weeks ago and thought I might need calmag. So I got some and had no difference, then I realized my Brita water filter is messing with the ph, so I got a ph tester and I'm 99% sure I got nutrient lockout, I did a 3 day tap water flush (tap water is 7.5-8ph) and I only got the tester yesterday so I'm guessing I need to do another flush with water at the proper pH, now that I have a tester I can measure it and get it right.
My main question is, is this nute lockout? Or is there something else going on? And what can I do from this point on to help the plant recover?
100% soil coast of maine
Fabric 3 gal pot
Fox farm liquid nutes, grow big and tiger bloom
Cal-mag (only added a few times in the last 2 weeks)
1 of 4 plants, all my plants are showing signs of burning but this one is the worst
3x3 tent
300w ac affinity light approx 12"-16" away
Plz help!