Your plants are fine. it does look a little heavy on the water.
You should not be needing cal=meg till flower starts. Thats when your girls require a little more cal.
RO is fine but you have to keep up constantly on your ph. and your ph to most should be around 6.5 but that is more of each growers style and what kind of nutes they use.
Do you have little slits cut into the bottom of the cups? Also your girls are big enough to get the hell out of there. The roots are starting to bind at this point and you are starting to lose growth you could be getting.
Good rule of thumb on watering:
Fill them till you get approx 10-15% run out. (also check that run out and see the ph coming out is in the zone) and if your pots are still wet after 4 days or so then you need to take a pencil and air out the soil so it will dry. You will have hot and cold spots in your grow so you need to check them individually and see.
They are doing fine right now .
Peace out