looking good so far sounds like your on the right track. Usally about 2 weeks into the plants life it will start to need some nutes. start off with small amounts and work your way up so you dont burn them.

if the temps are gonna stay high like that i would make a home made co2 kit. they are quite easy to make.and will allow for they high temps and help increase growth.

the high temps are causing them small containers to dry out very quick
I would transplant to something bigger soon those smaller containers will limit the growth of the plant.