pectina loosing color on the edges

[nsrogue]

I purchased a pectina about 6 months ago at the lfs and after changing over to LED's it seem to have lost color on the edges a little,
I thought It was getting bleached but not so sure as the color is coming back from the outside edges toward the center now.
will they dump some zooxanthellae if they become a little stressed ?

as you can see this guy has allot of mouths and likes to eat tons of brine.

 

[cloak]

will they dump some zooxanthellae if they become a little stressed?

I would think so.. LED's can be pretty intense sometimes. They might have been burning it up there for awhile.