Mephisto Grab-bag

N-Tox argh! Seeing some clawing after the feed with mega-crop + flora series last week. Also increased the light to 100% @ 30in D35, turned up fan to high on plants, and heatwave brought them to 82ish. lots of clawing next day...N tox, windburn, light stress, heat, or ALL?? Clawing got bad, flushed D36 with ~5L pH'd coco tap @300pm ~6.3 to try and help them recover. run offs were in correct pH range, but 1800ppm! next day reduce to 90% light at 36in, or about 33k lux or 530par. going to maybe lightly feed today D38, trying to keep around 700 PPM, low in N