WHAT IS CAUSING MY LEAVES TO CURL? (Day 64 pictures)

Hey mate that could be a little overfeed :-). If you overfeed, I would proceed as follows. Best if you have osmosis water and mix the stale water for 24 hours (after 24 hours the chlorine has evaporated somewhat) to an Ec value of 0.2. Then add Cal / Mag until the Ec is 0.4. This is your source of water, so you can flush. At the next pour, start with a quarter of the feed dose.

Bonjour je pense que tes plantes subissent un Stress végétal dû à la chaleur, essaie de maintenir ta temperature a 25-26°C , ++ ventilateur J'espère que cela va t'adé mais courage elle est belle malgres ca😉

It is possible your soil humidity level is a little to high for to long, or the plants don't like the heat or to bright lights indeed.