Acan looks like death

[Mekesterson]

Sooo, I just replaced a 3 month old 10k t5 bulb with an ATI blue+ and I think it caused my acan to go from this:

To this:

Would changing just one bulb cause this? (My apologies for the crappy quality pics)

 

[Optionman]

my acans have gone looking like that several times but they always recover. happens when fish bother them or i accidently dropped them in the tank while moving them.

 

[rtparty]

A sudden shift in PAR or spectrum can also cause corals to react funny. They made need a couple days to adjust

 

[shadowmonster]

Like mentioned above, I would find it some shade for awhile and see how it responds.

 

[Mekesterson]

Thanks everyone for the input. Just got home from work and checked on em, I'd say they're doin pretty good now.