Please help to identify deficiency / excess???

Okay. This is caused by this Your soil dried up too much. (Water peed out the bottom) If tat the case You need to add 200ml or so of water. To get the plant drinking again. Not too much.. like a person starved of anything for 2 long..coming back onto stuff plants are the same. After you have given life back to the plant. Then you can add nute mixes. By take is rhe burnt parts arw from u given EC feeds too soon to vets dry soil..this then makes the plant take up a large portion of the feed. Causing burns The end leaves are from the same thing. When ur soil dries up too much. It'll go for nearest source. (Bottom leaves get eaten on). This is the explanation in many cases of leaves at bottom showing need signs & also can show salt/ nutrient excess burn as you shouldn't feed a dry plant anything with nutes. Feed plane water, not too much or ppl light green edges on leaves, showing too much water. When in reality it was just too much water in a drought period of the plant. Small dose of water then apply fix if needed.

The burnt tips are from a strong nutrient feed. I don’t grow organically and I don’t know what soil you are using but I’d check what nutrients are in your fertiliser. For your stage now you want a NPK ratio of aroun 1:3:3. With all micronutrients included. Not tried the easy bloom but maybe a different approach will help. I had a quick look at your diary and I saw you are running out of vertical space so I’ll try help there. I read that your plants are just over 2 foot tall and the light to canopy distance is 12”. That’s only 3 foot. Is the light as far up as it will go, is your fan and filter taking up vertical space? You can have the fan somewhere else in the tent or even outside the tent. 12” is very close. If it starts to burn or bleach then dim the light. You should have done some lst early but it’s too late for that but what I did when a strawberry banana auto totally out grew a 70x70x160 tent was as best I could and careful not to snap it was bend the tallest branches and main stem over as much as I could. This will give you some space.