Acro bird nest died unknown reason

[ldam]

Few days a go I saw my bird nest a few branch brown up with brown flesh and then just sheet shed off, after another night the whole colony 10"+ did the same thing the whole thing was gone it started to spread to the Next colony and then to my green slimmer, I break what I can and dip it in coralrx but still couldn't save what left of the green slimmer any idea, bacteria parasite? All my other coral seem to do just fine I have the same type of bird nest and green slimmer at another spot doesn't effect it at all


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[GobyWanKenobie]

I had the same thing happen to a large sour apple birdsnest. I couldn't save the big piece, but other frags of the same coral in the tank were unaffected. The only thing I found wrong in my tank was my phosphates were a little high, but I don't know if they were high before the birdsnest or if the birdsnest caused it to go high. Even though I brought the phosphates down, I still lost a coco worm and one other sps within days of the birdsnest.

 

[Jeff.:P]

What are your parameters? Birdsnest usually first one to go when the Alkalinity is incorrect. Also FYI birdsnest are not Acropora but Seriatopora.

 

[daves-reef]

+1 on Alkalinity but not just the specific number your at. But has it fluctuated? Alk swings can be bad. Are you dosing and has that changed at all?
I shoot for stability within accepted range for ALK now rather than a specific number.

Did you recently add or change GFO? Have seen some cases of possibly bad bulk GFO and if not added correctly the GFO can also cause Alk swings.

 

[ldam]

Nothing changes all my other bird nest are fine I have the same kind of bird nest at another location doesn't effect at all, just that area


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[ldam]

Haven't changed gfo in a month


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[ldam]

First I thought something eating it but didn't see anything overnight, could it be bacteria


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[GobyWanKenobie]

I did not have an alk swing either. For me, my open brain and chalices show signs of alk problems before the birdsnest would. I had it for at least 4/5 years, grew it from a small frag. Now I'm kinda glad it used to break so easily because I still have frags all over the tank.

 

[ldam]

My chalice seem fine it effects few others colony close to it
I blame petco I add a green mandarin last week with some of their water


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[nemodan]

Before blaming Petco, have you tested your water. As been said have you had swings in Alk ? I had also birdnests dying because of issues in my water, and not afecting in the same way Acros. It is just a though.

 

[dz6t]

Large birdsnst colonies are prone to RTN suddenly especially at 10 inch diameter.
I have seen many large colonies of bidsnest die off slowly from bottom up and inside out. I also saw large birdsnest RTN overnight suddenly with no apparent reason.

I suspect it is due to light and flow due to the dense "nest".

After loosing several large colonies, I have been keeping all birdsnest no larger than 4 to 5 inches. I prune them frequently to make sure all branches get good flow and light. Since then I have not loose a single colony. But now I have hundreds of small colonies everywhere.