Help. Is this bleaching?

[kirb_dog01]

I got this montipora from the swap. It's green with orange polyps.

It was doing great until I returned from a business trip last week.

The surfaces facing the light are turning white.

All other SPS in the tank seem to be fine.

It's towards the top of the tank under a 90watt 10000k white 460 nm blue led fixture.
medium flow.

8.3 ph
8 dkh
420 cal.
78 deg.

Any ideas?



Attached files /attachments/sites/default/files/DSC_0513 14-28-21.jpg /attachments/sites/default/files/DSC_0532.jpg

 

[Plumstr8]

Did the tag on the coral say what type of lighting it was beening kept under? Your lighting could be stronger that what it was being grow under, that can cause bleaching. Try putting it at th bottom of the tank where there is less light.

 

[tuberider]

What Cal kit are you using?

 

[kirb_dog01]

No lighting info on the tag.

I'm using and API kit.

 

[tuberider]

API cal kits read low, double check with another kit if you can, I like Salifert. IME when digis retract polyps like that low Cal is most often to blame.