Have an issue

Its my first indorr grow I started them all from seeds and I have noticed that my plants have stopped growing for some reason they are all on 18/6 and have been since seed/sprout the get 24-8-15 once every second watering so its pure water at 6.5 6.7ph then water at same ph then nutrient in water at same ph.

medium is potting soil mixed with vermiculite and perlite at a 1-1-1 ratio and they seemed to be doing fine.

one hot day 1.5 weeks ago the room reached 87F with my fans still blowing and had a leak on a day which brought the RH to 70+ which I quickly fixed.

But since the growth has stunted the room has stayed at roughly 83F and 49 to 60 RH.

and another question has anyone seen a UNPINCHED plant do this ?????? cause I never have

Check the internodes for sexual maturity. I have noticed that at maturaty some plants grow out after they have reached their potential for up

there are no pistels or sacks yet. I havent even sexed them yet and im constantly looking for the signs but I dont want to force them to show sex then revert back to 18/6

That plant is only 5 weeks from germ to sprout that only took 1 day for some reason as with the rest but I have 1 plant that is 3 times as tall as the rest they all came from the same strain and are all under the same light they all get the same nutes on the same schedule so Im still confused as to why they have stopped growing.