PPM To High

stopping with fertilizing altogether to fight a toxicity may cause your plant unnecessary stress, if you have a toxicity from 1 or 2 nutrients that doesn't mean the rest are abundant as well! Try pinpointing the exact issue of what causing that stress to your plants and adjust fertilizing accordingly. For example if there's Nitrogen toxicity instead of not fertilizing just reduce the Nitrogen based fertilizer. in your case I'd say your plant is suffering from some light/radiation stress and Phosphorus (P) toxicity - leaves clawing and folding upwards, leaves develop irregular yellow spots and blotching. Increase the distance between the lamp and plant by about 7.5-10cm/3-4inches, and decrease your bloom fertilizer by about 30-50% if problem persists reduce it by another 10-20% each week until spreading stops completely. Hope this helps! Good luck and happy growing :)