So I am am not getting pe in some of my acros. And I am trying to figure this out. 
Ammonia is undetectable 
Nitrite I don't have a Test for
Nitrate between 0 and 5 it's really hard to tell which color 
Alk  162 ppm and steady 9.072 dkh 
Phosphates 0(API test but no change in color at all)
Ca is 500 
Flow is two wp40 one on wave one on else mode
I checked all for pest none found 
No fish that are known coral nippers 
Is it to much light not enough light  
Do I need to add cube of Cyclopes once a week