Blue corals turning white

[jimmypencil]

Is there an element that affects blue corals specifically? 2 of my Montis which are blue are getting slight white patches in the center, it is strange because they are the only corals affected and they are both blue. This happened to me once a few months ago and i resolved it after a week or 2, but of course i don't remember what i did. I have an icp test from last month when everything was doing fantastic, so i will send another one out to compare. here are some pics (it doesnt look as bad in the pictures but there are clearly white patches that are not spots of new growth.)

 

[Reefkeepers Archive]

It could be getting ready for new growth, but I'm not sure. @encrustingacro?

 

[thamnasteroid]

Generally, white as a form of new growth is at the edges of a colony. (There are exceptions to this case, such as Orbicella franksi, but those don't really occur in the hobby).

 

[jimmypencil]

Bump?

 

[Science/G]

Tank looks great! Don't tinker too much. Maybe add a small amount of trace elements and see if that helps

 

[jimmypencil]

Tank looks great! Don't tinker too much. Maybe add a small amount of trace elements and see if that helps

Thank you! Yea that’s what I ended up going with just adding a tiny amount of replenish and iodine.

 

[ReefingDreams]

Fluoride affects blue. But I don't think that is your issue.

 

[homer1475]

Base color is green, they have blue polyps. It's not what one would call a blue coral.

White in the center(in your case it's loosing the green skin, which causes the polyps to bleach or close up), and not the edges of monti's is typically bleaching.

Bleaching can be from anything. From temp spikes, to alk spikes, to nutrients depletion, to ditritus settling on them. Literally anything can cause monti's to bleach in spots like that.

 

[jimmypencil]

Base color is green, they have blue polyps. It's not what one would call a blue coral.

White in the center(in your case it's loosing the green skin, which causes the polyps to bleach or close up), and not the edges of monti's is typically bleaching.

Bleaching can be from anything. From temp spikes, to alk spikes, to nutrients depletion, to ditritus settling on them. Literally anything can cause monti's to bleach in spots like that.

Likely just the lighting in the photo. The name of the coral is blue Monti cap from cherry corals.