RTN on One Side

[echoreef]

I am not sure if this is RTN, but the tissues on one side of my Humilis is gone. Other side of the coral looks healthy still. Is this RTN or something eating the tissues away? This just happened overnight.

 

[TimothyJ]

Looks like RTN or STN. Fragging to the base may help, but no guarantee.

 

[echoreef]

It's strange because this is the only coral affected. I am worried that it will spread to the other corals. No temperature swing or any sudden changes to my water quality. Just happened to have the water tested last night.

 

[TimothyJ]

We have a little saying at the LFS that can be one of the most baffling thing about keeping a reef tank. It is something like this, "Sometimes just looking at a coral wrong can make it RTN/STN." Unfortunately, you likely will not know why it started to lose tissue, but often when I just hope it will get better, I end up with a beautiful piece of white skeleton. I hope yours turns the corner, but I have not been lucky often in this situation.

 

[epicurus84]

If it's RTN it will die for sure wasting any moment is too long. However i never saw STN or RTN just start in the middle of a coral. I's usually at the tip or at the base. Also the patern is kind of strange.

What you can do at least is dip it. They say it can stop RTN (no succes here) but it will at least kill of any worms/snails that eat it.

 

[aqua80]

RTN for sure...
If it has not completly passed away now try to save the encrusting by fragging the tip...

I've had some RTN begining anywhere on the coral :

end up saving some branches...
good luck !

 

[echoreef]

It got worst last night. Now the RTN has spread to the other side of the coral as well. I am taking it out and chopping the entire stalk off and only leaving the encrusting base. Hopefully it will grow out again. This thing is such a slow grower for me for some strange reason. It's been there for almost 2 years and hardly grew.