Probable phosphorus deficiency?

Temp is not ok running 2.5kph vpd 24/7. No transpiration, no respiration, ph fuxked, ec, fuxked, Doesn't matter how much you feed it, if waters not moving nothing is moving. Salts stay in medium.High soil salinity, a major issue, arises from the accumulation of soluble salts, primarily through natural processes or human activities, leading to osmotic stress, ion toxicity, and nutrient imbalances, ultimately hindering plant growth and productivity.

DREADFULLY over fed, plain and simple. It aint no deficiency! I grow in temps of up to 45 degees Celsius outdoors, it is not a heat issue either.

Hi, I'm pretty sure that it's partly due to the heat, which shouldn't normally be above 27 degrees. But when I look at your setup, and you have these in small pots, and then you add the amount of fertilizer that is in your diary, it's an overdose of nutrients. You have to measure the runoff, the water that comes out of the soil, and that shouldn't be above 6.5. Also the EC value, which shouldn't be above 2. If your soil is too salty, then at some point there will be a nutrient blockage and your plants won't absorb anything at all. Try to correct that first and then you can take action. If too much pH comes out of the pot, only water with pure water. The temperature will probably be heavier. More air circulation, but if the air outside is already hot, there's not much you can do, maybe a small air conditioning system.

This looks like an issue with PH/micros to me and now other things are locking out or depleting. https://420life.com/wp-content/uploads/2021/10/Marijuana-Leaf-Deficiency-Chart-scaled.jpg Heres a link to the leaf chart that's fairly good. I would also calabrate your EC/PPM pen and your PH pen asap and retest the medium/runoff/feeding solution. as something is really off. I agree with numbers temps are not helping it. and you should check your light hang height, Hot temps will cause it to drink more if RH is low. if RH is high it drinks less. I'd also check if your feeding the right ammounts of all the remo stuff, seems kinda high with a total of 12ml/L but it might be more diluted vs concentrated.

leaf chart says it could be a couple things... i took a look at more pics and you have the symptoms even where leaves are well-shielded. You sure pH is okay? Does "remo" include the trace elements in at least one of the products? Boron and iron are two potential causes. This is so advanced i'm not sure. Would be better to see how it progressed. Regardless, 95F is not helping anything. Is your VPD sky high? And if not, better watch out for dewpoint when lights go out and temperature drops precipitously.

light damage exacerbated by heat. don't try to mix soil with soilless. All this does is introduce unkown amounts of nutrients and takes away your advantage of easily diagnosing problems if you keep track of your ppms per element etc. your formula should provide a complete diet and not cause problems in long-run. keep tweaking until it's near-perfect seed to harvest for 95% of strains. If not giving 10% runoff waste water, start doing that religiously as that too is a super power of soilless growing - a consistent level of nutrients that won't build up, meaning any issue you see is formula related, which makes diagnosing that much easier. Diagnose prior to this late progression. Patience is good, but this is waiting way too long to admit there's something off. It really shouldn't take more than 3-4 products to provide a complete diet.

I think the main Problem is the heat with 35°C its way to hot the small leaf also show this.

just noting living soil + chelated nutrients = no effect at best / kills the microbes at worst