Rtn or bleaching?

[Based]

It's a Ora green birdsnest that I got yesterday, all of my other sps is doing well. I think i placed it too high and it bleached. I've watched a time lapse of rtn and it doesn't look like that's what's happening to it, but I don't know a lot about sps problems.

 

[Based]

...

 

[Jettareefer]

I hate to say this but it looks like tissue necrosis, bleaching would be somewhat uniform. I can tell right away from seeing the exposed skeleton without any polyps. I would test your water just see if you can find the cause.
-Addison

 

[Jettareefer]

I would remove the big peice on the left, because the little peice to the right look unaffected you may be able to save that. Best of luck!

 

[trueblackpercula]

From the looks of that picture you have a lot going on In your tank. Remove the bad part on the left and try and save the little piece to the right.

 

[aqua80]

looks like both
patches of tissue necrosis and some bleaching with live polyps...

 

[Based]

I thought if it was tissue necrosis it would move in one direction and take the polyps with it, I found out my alkalinity was 6.8, don't know why I just did a water change and added water to the tank to top off the water I used to drip some zoas and what not. On the white part I still see some green polyps. I'm a newb to branching types of sps.

 

[Based]

So is the little piece bleaching on the tip or is it tissue necrosis too? If it is should I cut that off in the middle? And on the big piece those spots are green polyps

 

[Based]

It still looks like how it did in the pics, I need advice!

 

[Ssteve]

hack it up and remount it

 

[rsaha]

If you do hack it, make sure you give yourself a bit of margin (i.e. leave behind a bit of the good tissue).

 

[fishguy597]

Maybe I'm wrong but it looks like you have LEDs. if so put it on the sand bed not directly under a cluster. let it acclimate and move it up slowly after it heals.

 

[ssscuz]

Looks like rtn, if it's a new frag, one of your water parameters may be different to the tank it came from and it may have shocked it.
What's your kh?
Do you calibrate your refractometer with calibration fluid?

 

[Based]

Yes I do have LEDs, and it was my kh and my lights. My kh was super low, I don't even know how. I'm guessing the bigger piece is a goner and I can some how salvage the smaller piece?