Whats wrong? Overfertilized?

Hi, i was just messing around with this one , didnt want to buy anything so all i can tell its 30 degrees C a little bit of C02 use
12/12 lights
was fertilizeng from seed had organic fertilizers , but when started flowering had only fertilizer npk (2,4-0-7,2) +mikro and some Calcium (not organic)
wattering 1 time 5-7 day 4 littre (for the last 2 times only bottled water)

have no in/out ventilation only cirkulation 2 pc vents...

sorry for bad quality pictr

top leaves is a bit yellow and bended down

edit: and using heavy harvest 10-20-20 mixed with soil dont reali remember how much
damn and sorry for the wrong thread

it does not look like any nute burn you might be deficient in some thing maybe mag?

last fertilizer content %
N 2,4
N-NO3 2,3
P203 1,8
K20 7,2
MG 0,6
S 0,9
B 0,002
CU 0,001
FE 0,08
MN 0,01
MO 0,0002
ZN 0,006

i used it with Ca fert content
% :
Ca 2,2
N 1,8
N-NO3 1,8

Feeding way to much and not in proper portions???

looks like nitrogen toxicity from that one pic, would need more (and better) pics to be sure???

yes it can be too much, couse in veg i got organic fert and plant was looking very good was feeding a lot

so i should keep wattering with pure water?

I would give her a good flush and get your ventilation in order (very important variable)

After she recovers from the flush start her on a "good" nute regimen (by that I mean balanced) 1/4 strength per instructions

ty a lot, will do as u sad
+rep