Favia change

[McCune]

I bought a favia last week because it looked like it could color up nice. It started dark green with white centers, this week it's got purple, slight green and maroon with white centers. Is it normal for such a big swing in color in a week?

 

[Psirex]

all depends on water chemistry and lighting.... Got any before-n-afters?

 

[Zeyko]

Some corals change colors because the lights