i think that stagnant air, and too cold of air over the past few days is their main problem. they did bounce back at one point, but seem to be struggling again due to the cold. i think better air circulation and co2 would help them, with the heater and the lights i think i can boost the tempos to levels where co2 would be useful... wouldn't co2 help small plants become bigger?

also they are not that droopy, thefan was blowing on them just right in the pictuire to make it look like those leaves are hanging down alot more. they ar actually quite erect when the fan is not on them, like the right side of the largest plant...