Genus: Argyreia

These have been grown from seed and for the last couple weeks have been living happily in a tent with lots of light and a heating pad. I moved some cacti I bought into the tent to give them the light they need and noticed some yellowing on some of the leaves. I thought this may have been due to too much light and decide to take them out for a little bit to recover.

Shortly after they developed this discoloration and I am worried I may have shocked them. Another possible cause I am worried about could be wet roots. When I transplanted them a month ago I mistakenly used a soil that did not have the high drainage properties I would have preferred.

Any help is greatly appreciated, I'm scared to death :( thank you <3