First, I recommend never using clear cups again. Roots do not like light.
Second, how long ago did you transplant into the 3 gallon pot? They can take up to a week or more to recover.
Third, do you ph your water before using it?
Plants look ok overall. Just try not to overwater them. Also, when you check them everyday, it can be harder to see growth. Good luck and let me know if you see them growing again.