Coral Not Opening

Hey guys,
I noticed this coral is not opening for 3 days now. I am very unformilliar with corals so far, and cannot figure out why. I will measure my levels tonight, but does anyone have this happen before?

It looks like this now:


This was last week:

 

Sorry, but I can't even tell what kind of coral that is.

 

https://www.livingreefs.com/new-frag-t21149.html

this was my id thread, wasn't a consensus on the ID - does that help?

 

how long your tank been setup? what do you have in your tank as far as animals.

 

Almost 3 years. I have a blue chromis, clown fish, blue spotted puffer, coral beaufy, green star polyps, and an anemone. The coral is on the other side of the tank from the other stuff, I have 2x 175 watt metal halides and 2x 40 watt flourescent lighting, nothing else is really affected, but I just had a brand new (friday) yellow tang pass away this morning...I have to test my water...going to do that now.

 

Alright...nothing looks out of range:
Nitrite: 0ppm
Ammonia: 0ppm
PH: 8.4
Nitrate: 5-10ppm (same color on test kit)
Calcium: 450ppm

That doesn't explain the death of my fish or the coral not opening up....I have checked all of my timers and the full daylight is 12 hours with a simulated sun up...one bulb than another, then vise versa for sun down...and actinic stays on for an additional our at night...no other fish seem out of the ordinary....FRUSTRATING!! haha

thanks for any help in advance
-Dan

 

have you checked the coral for any type of critters on it, eating at it maybe?

 

I haven't seen any...just might be a nocternal thing...should I pop the lights on after they have been to sleep for a few hours and check? It's frustrating too I have had it for about a month and it's starting to grow off the frag rock and down onto my live rock, then all of a sudden friday morning it was closed...and has stayed closed ever since.

 

use a flash light and check at night...

 

If the coral is xenia, you may just be unlucky. Some people can keep it, some people can't. No one really knows why, in some tanks it just tends to melt away.

 

I'm confused as to why it was growing for a while tho, then all of a sudden it took a crap! I would hope that if it was unhappy it wouldn't grow at all right?

 

something in your water chemistry must of changed.
whats your salinity?

 

it was .023 this morning...it stays right there...might drop .001 + or -

 

Do you feed the corals? Trace elements and stuff? I know my corals love zooplankton, and the fish dig it too.

 

I agree OR there is diffidently something picking at it to keep it closed up.

 

Alright, I couldn't make it back to my office last night to check for critters, but this morning the coral is partially out again, just a few sprouts are sticking out of the "bubbles"...so it looks like it might be coming back open? The coral beauty shows no interest in it as of right now, but he could me picking at it without my knowledge I guess.

 

Just took this pic...it's starting to peak out again.