Sps turning pale

[DeepReef]

Recently purchased frags of sps , but they look horrid.
One of them turns absolutely pale in the matter of two weeks , when bough it it’s vivid green.
Tank is 16 months old
Recently had ati icp test done , according to ati I have high level of copper.
Since then I’ve treated the tank with ati detox for copper.
This is recent parameters
Nitrate - 20 -30
Alk - 7
Mg - 1350
Cal -4
salinity - 1.025
Phosphorus 26

any help greatly appreciated
Apologies for terrible pics

 

[LAA]

Send pictures in white light plz.
Also same thing happened to my green acropora i got a month ago. After a week or so it turned very pale. I am working on fixing that now. I have found if you over feed it seems to help. mine has gotten some green back.

 

[Dkmoo]

Par levels? Any kind of stress can quickly bleach out an acro - water chemistry is only 1 part of it.

Could also be due to improper lighting, flow, or even spectrum. Even if your conditions are within the acro range, it could still shock and bleach if its too different from the conditions that it was previously in - ie, if an acro "grew up" in a t5 tank under 350 par, then suddenly goes to an all LED tank with different spectrums, even if raw PAR is similar, the shock of the new system could also lead to bleaching if not properly acclimated.