Og Kush (SS Freebie)

Week 4 flower disaster, my ph was too low and this OG Kush let me know it was a problem immediately. I didn't know what the hell was going on, as no other plants had issues and they were all under the same feed. Did an emergency flush to see the ph was too low. My Ph pen was off and pretty much unstable. I threw it out and bought another. The leaves clawed very badly and began getting crispy with deficiencies showing. After flushing the media out to a 6.0 ph runoff, she got only watering with no nutes and a defoliation of every fxcked up leaf. She was lookin bad...