This is a DWC grow w/5 gallon buckets. I've had pretty good luck up until now. I recently discovered my PH meter needed calibration, my babies were @4.8ish for over a week. I immediately flushed and went back to the 1000ppm GH 3part they had before. I saw signs of nutrient burn instantly so 3 days later I flushed again and went down to 600ppm. It's been close to a week now and the leaves continue to spot,turn brown, and die. Nutrients continue to increase and PH is still drifting lower. The roots are also very healthy. The strain is Barneys Vanilla Kush and flowers for 9 weeks. Please help me save them!

Grow temp 77/48%
Water temp 66
400w HPS
RO water w/1.25ml calimagic per gallon in addition to GH nutes.

I can't upload any pics at the moment, server error, but some good old fashioned brainstorming until then would be appreciated.
Krenshaw Reviewed by Krenshaw on . 5 weeks into flower and having issues. PLEASE HELP!! This is a DWC grow w/5 gallon buckets. I've had pretty good luck up until now. I recently discovered my PH meter needed calibration, my babies were @4.8ish for over a week. I immediately flushed and went back to the 1000ppm GH 3part they had before. I saw signs of nutrient burn instantly so 3 days later I flushed again and went down to 600ppm. It's been close to a week now and the leaves continue to spot,turn brown, and die. Nutrients continue to increase and PH is still drifting lower. The Rating: 5