help please

[EcLiPsE_001]

I have several zoo and paly's the more recently added paly's PPE's RPE's and Candy Apple Reds all look bad they are not opening all the way the skirts look like they are disappearing, melting into the polyp itself all of my others eagle eyes, ring of fire, incredible hulks are all fully open and beautiful. What is going on with the others???

 

[twizzlerman77]

Try putting them in a little less light and flow to see what happens.

 

[mfinn]

What are you testing for and what do the results say?
How old is the tank?