I lost a colt coral and a yellow sinularia

[zygote2k]

In the 150 maint. tank, a Colt coral that was 12" tall suddenly perished on Monday. It looked like RTN if such a thing exists for softies. I cut off the entire colony and removed it from the tank. I changed the carbon and did some tests- water within normal parameters. Today a Yellow Sinularia has some portions that look like they are going south. They were still intact even though I tried to brush the bad spots off. There are 7 leathers in the tank, 5 of which have closed up. The SPS and the Duncans seem to be fine as well as the rest of the livestock.

Does anyone have any ideas as to what could have caused RTN in a Colt coral?

[lanman]

I've kept softies in every kind of environment... the only ones that have ever perished are xenia's. I can't even guess.

 

bob

[Origami]

Not sure what the problem is but have you may want to consider some big water changes to get whatever's in there out of there.

[ctenophore]

A few months ago I lost a reasonably large green sinularia, despite all other corals (including other sinularias and similar softies) being perfectly healthy. I'm pretty sure it was because this sinularia was close enough to one of my streams that the continuous laminar flow somehow stressed it until it got an infection. It went from healthy (although somewhat deflated due to flow) to black and rotting within 2 days. Did either of these two corals you lost have any similar stressors that might have contributed to an infection?

[zygote2k]

Well, both of them are in the direct stream of a Koralia 4. The Colt was right underneath it and didn't get the brunt of the current, but the Sinularia received a good deal of it. Both of these corals had been thriving in the wake of the Koralia previously.

I would do a large water change, but I think such a change might be more of a shock to the rest of the inhabitants. The jumbo Hippo Tang just went through an ick battle, the last thing I want to do is trigger another one. FWIW, when the Hippo got ick, I decided the best course of action was to let him ride it out. I did nothing except regular maintenance and I'm sure his immune system is stronger against another outbreak.

[davelin315]

I would do the water change. Your fish will suffer more if all of those corals die off. One thing to consider is whether you have some sort of parasite or infection in the corals themselves. Also, it's possible that there's some chemical warfare going on that you're not aware of and the losers are fouling the water for not only themselves, but the winners, too. That's why I advocate doing a water change.

[zygote2k]

Are there any known parasites that attack either of these 2 corals?

[Sugar Magnolia]

I was looking in Borneman's Corals book in the diseases section. It might have been something called 'soft coral collapsing condition' (pg 385-386).

[ctenophore]

It's probably bacterial, and will run it's course. Of course that may mean taking out the rest of the softies, which it seems to prefer. I would iodine dip any other softies that start to look bad. Water change is probably a good idea simply to lower the free floating population for a little while. I'll bet this is where a good UV would come in handy.

[ctenophore]

Well, both of them are in the direct stream of a Koralia 4. The Colt was right underneath it and didn't get the brunt of the current, but the Sinularia received a good deal of it. Both of these corals had been thriving in the wake of the Koralia previously.

Mine thrived in the flow too, until it grew big enough so that part of it was always getting hammered.

[zygote2k]

I'm going to do my normal 15 gal. W/C today. Thanks for all the responses.

I'll post if I find any more anomalies.

[zygote2k]

I did my water change tonite and noticed that the yellow sinularia seems to be stabilized since yesterday. The other leathers are still closed, but I think things will be back to normal in a few days.

[davjbeas]

I have a H.O.T. magnum 350 filter for emergencies and carbon you can borrow if you need it.

 

David

[Jan]

In the 150 maint. tank, a Colt coral that was 12" tall suddenly perished on Monday. It looked like RTN if such a thing exists for softies. I cut off the entire colony and removed it from the tank. I changed the carbon and did some tests- water within normal parameters. Today a Yellow Sinularia has some portions that look like they are going south. They were still intact even though I tried to brush the bad spots off. There are 7 leathers in the tank, 5 of which have closed up. The SPS and the Duncans seem to be fine as well as the rest of the livestock.

Does anyone have any ideas as to what could have caused RTN in a Colt coral?

 

Maybe ask these folks and send a picture?

http://www.coral.noaa.gov/

[SkiCurtis]

A few months ago I lost a reasonably large green sinularia, despite all other corals (including other sinularias and similar softies) being perfectly healthy. I'm pretty sure it was because this sinularia was close enough to one of my streams that the continuous laminar flow somehow stressed it until it got an infection. It went from healthy (although somewhat deflated due to flow) to black and rotting within 2 days. Did either of these two corals you lost have any similar stressors that might have contributed to an infection?

I had almost the exact same thing happen to me with a very neon green singulara and I still have never seen one so neon green.

I never new why but now it sounds like a match.

[zygote2k]

As of yesterday,everything is fine and the yellow Sinularia looks to be making a full recovery.