NPK burn and crawl on start of 7th week from flip

Growing unknown indica dominate strain in FFOF with FF Big Bloom, Tigee Bloom, and Grow Big never got over 1700ppm. Now feeding around 600ppm Big Bloom and Tiger Bloom a couple times a week. Just starting to cloud and about 55-65% pistols receded and dark, but still pumping out white curly ones especially on the 4 main stems. Fans and couple sugars are dark green with some burnt tips, slight brown spotting and downward crawl. Do I keep feeding lite for the last few weeks or switch to water only?

Looks like you've got a case of nitrogen toxicity, I'd check the crystals and start a good flush then harvest

Thank ya- that's the conclusion I came to. Checked the runoff and it was up around a 1000ppm after a 500ppm feed so I started the leech earlier this week. Hope to finish in the next couple of weeks.