Are Corys not very active? Because Mine were active when I first put them in the tank, then they ate. Now all three seem to be just sitting on the gravel floor or ona plant leaf.
Congratulations on getting the new corys! Everyone likes C. Juliis. They are pretty little fish!
Corys alternate between periods of activity and just sort of sitting around. It's normal for them. You might find they are most active in the evenings and mornings too.