Nutrient deficiencie or nut burn? Not sure

Hey, buddy! 👋 This is nitrogen overdose and, as a result, phosphorus deficiency. Check the runoff ppm for excess nutrients (nitrogen). Bring the runoff back to the initial soil values it had before planting the plant. 1. Set the soil and watering pH to 6.3 for the flowering stage in soil substrate. 2. Make the following additions: - Big Bloom 4ml/l - Tiger Bloom 1ml/l - cal/mag as needed. Always consider that if you are using soft water (250ppm and below), you add 1ml/l (cal/mag). If you have hard water (250ppm and above), use calmag supplements as needed, up to 0.5 ml/l! 👆 I write PPM in a coefficient of 0.5 for ec! 👆 The main thing is to avoid this phosphorus deficiency at growth points and flowers! 👆 But also don’t overfeed the plant with nutrients! It’s already well-developed and has enough strength to resist the deficiency, but it won't last long if you overfeed it with nitrogen! It will quickly get problems and die if you don't lower nitrogen concentrations during flowering. 👆 Good luck, buddy! ✊😇

That's a nut burn.. Checked your whole picture of the plant.. Can see it right away.. Lots of dark foliage.. A bit too heavy for sure... What can be "referred" to as a lock out but you are definitely out of balance.