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Post by reggie on Mar 8, 2009 13:57:21 GMT -5
New problem. My 1 month old purple polyp birdsnest colony has been hit with RTN/STN (Rapid/Slow Tissue Necrosis). The last change I did was to add Rowaphos and a Koralia 1 where it was to increase flow where it was.
I had no choice but to immediately dip it in Pro-Coral Cure and frag it to remove big parts with peeling tissue. Hopefully it survives.
I'm now on the lookout if other corals will get it. As of now, I don't see anyone else with symptoms. I'll do an update after a few days/week.
Anyone experienced RTN?
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Post by ADMIN2 on Mar 8, 2009 14:30:58 GMT -5
The korallias are known to leak voltage, do you think that might have been what happened?
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Post by reggie on Mar 8, 2009 15:07:26 GMT -5
I just have a Korallia 1. I think only 2s and 3s are the only one reported to have a voltage leak. But maybe I should remove it and see.
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Post by ADMIN on Mar 8, 2009 17:30:46 GMT -5
I can confirm #4s have had leaks as well, not sure about #1s Reggie.
Yes, RTN is more of a symptom rather than a disease. If a SPS starts experiencing RTN (Rapid Tissue Necrosis), something changed and caused a great deal of stress to that animal. If the conditions are temporary (temp, pH, etc), it can come back, but if they are constant (i.e stray voltage, drastic light change) it prob wont adjust. There are two factors which occurred prior to the event one of those is likely the answer.
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Post by ADMIN2 on Mar 11, 2009 17:25:58 GMT -5
Do you have RTN or STN? If you had it RTN you left for work, came home and it was completely or almost completely bleached. If you have STN, it is either starting from the base of the coral and working up or it is starting from the tips of the coral and working down. This usually takes a few days to get bad. These conditions should not be used synomously. By knowing which type happened I could give you a little better advice.
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Post by reggie on Mar 11, 2009 22:49:09 GMT -5
It's more like an STN. The frags have started STN too. I don't think they will survive. All others look healthy.
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Post by ADMIN2 on Mar 12, 2009 18:47:48 GMT -5
Have you figured out what the problem is?
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Post by reggie on Mar 12, 2009 21:28:21 GMT -5
Have you figured out what the problem is? No, not really. It seems like it has just been isolated on the bird's nest. Looking around though, I see some whelks which were hitchhikers. I wonder if they had something to do with it...
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Post by ADMIN2 on Mar 12, 2009 21:37:57 GMT -5
I doubt it but they might be bothering it now that there is damage.
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Post by reggie on Mar 12, 2009 22:01:03 GMT -5
Ok, I found this:
"There is a risk of reducing phosphate levels too quickly in SPS dominated reef tanks. Some aquarists have speculated that such practices have been the cause of rapid tissue necrosis (RTN) or slow tissue necrosis (STN). "
Looks like this is spot on, on what happened.
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Post by ADMIN on Mar 12, 2009 22:45:22 GMT -5
Hmm not sure, I have run Phos removers before without indecent to anything other than my leathers but I suppose it could be. I suspect rather than 1 there were several causes which threw the system out of balance.
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Post by ADMIN2 on Mar 31, 2009 21:35:09 GMT -5
Did you get this figured out?
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Post by reggie on Apr 3, 2009 23:59:35 GMT -5
The bird's nest did not make it but the others are all fine. I've stopped adding new stuff. I thought I'll let what I have grow and focus on keeping my tank stable.
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