Zoa 911

[Jeffcb]

Two days ago these Zoas closed up and are staying closed.
What could cause that? As you can see from the additional pictures all the rest of my Zoa colony's are doing well.

 

[bdunn13]

It happens to me all the time. It worries the crap out of me too. However, they always bounce back. I wouldn't worry about it.

 

[uhgster1]

Just in case, make sure you don’t have any salt creep nearby. It happens all the time, you’re doing something around the tank (shifting a cover, moving a light, feeder, etc), and you inadvertently knock off a small chunk of salt creep and it lands right on a colony. Happened to me with some alien eyes. Colony stayed closed up for a week.

 

[Jeffcb]

Okay. 1 week later they opened back up!

Now these are closed up! What's up with that. They never do that.