Ok my clones were water deprived due to its root growth and me not watching it properly. The leaves were very droopy this morning, and when I watered them and put a excellofizz tablet in there the leaves seem to be totally erect hours later. I mean there standing straight the hell up. The only changes that I made is that I put a tiny heater inside the tent (intead of outside) at a temp of 80 degrees away from the plants so it can heat up the tent. The humidity dropped from 50-60% to 30-35% once I put that heater in.
from the information u provided ur plants are just 'prayinh for light' this is normal and a sign of healthy plants.
I usually let my plants dry out pretty good till they are droopy. Once I water real good they perk up like you describe.