Light acclamating corals

I have some new sps from C.O.R.A. frag swap!! (Red montipora, yellow cup, purple haze cup, green hydnophora and some kind of green montipora) and they are doing great so far i am light acclimating with window screen. Also get another question, i have had the green montipora for about 2 weeks and i move it like 3or4 inches every week is that the right way to light acclimate them? The tank that they are in is a 90 gal. I am redoing my refugium, making it bigger and deeper. all my parameters are really good the only thing is my Calcium is 430 i think that’s a little low but i am doing a 15 gal water change tonight but i do one every Monday with my ro/di premade saltwater heated to 78 to be the same temp. And any tips on the corals that i have to make sure they are going to stay alive and grow like crazy?????? i will post pictures later of were i have the corals.

 

430 is plenty of Ca - wouldn't worry much about that. Seems like you have everything under control.