Uh oh...is this RTN

[cooper]

Folks:

Just got in and noticed that the bottom of my ORA green birdsnest is bleaching. Some xenia have grown under this coral and are touching this area. I am hoping that it is not RTN. The attached picture is not very good, but the area of my concern is just about in the center of the picture. If it is RTN, what do you think. All water parameters are right on and other corals look fine with good polyp extension. Thanks.
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[brianjfinn]

Looks like it to me. Might want to start fragging.

 

[mockery]

I don't believe that is RTN. I believe that the other branches have blocked out the light, and it has just died.

 

[cooper]

Mockery - that was my first thought, but I did not know if such a thing actually happened. How long should I wait before I take drastic action?

 

[mockery]

If you see it spread to more of the branch tonight. Bust out the clippers. If not just wait and watch it.

 

[chauwall]

It's not RTN nor STN. I thought that when my BN did that. Since it's a fast, dense grower, the bottom inside will not get any light hence the white. If any softies touch it, that will happen too. I wouldn't worry about it, that's normal.

 

[ichthyoid]

I have read that xenia is one of the most allelopathic (producer of toxins that inhibit others growth) corals that there are.

 

[ralph atl]

also make sure the base is getting good flow.

 

[mvm]

Take a turkey baster to it. If the tissue blows off, you have a problem. If not, it's just shaded out the underside of the coral and all is well...

 

[grouper therapy]

MvM;472165 wrote: Take a turkey baster to it. If the tissue blows off, you have a problem. If not, it's just shaded out the underside of the coral and all is well...

Good call.

 

[cooper]

Folks...you are good friends and an incredible resource. I will let you know tomorrow how things are progressing.