I Hate It When This Happens!!!!

reefnut

Active Member
I have another coral falling victim to RTN... all I can think of is the battle between it and the cap caused it... the tank has been doing so good




 

viper_930

Active Member
I hear ya Reefnut. It always hurts to loose a coral to RTN, and yours is such a big piece too.

Whenever I have a coral RTN, I do an iodine dip for 3 minutes with diluted Lugols iodine. It always seems to stop the RTN for me, and the live tissue would eventually regrow in or grow over the dead skeleton.
 

reefnut

Active Member
Excuse my ignorance....what does RTN stand for?
RTN=Rapid Tissue Neucrosis, many things cause it and it's difficult to stop. Basically the coral goes into complete failure and sheds its flesh.
Thanks for the support guys... Viper, I have never been able to stop it but I will try the iodine dip if it happens again. Last night I removed the coral and fragged what I could. It is a fast grower so if I can get a frag to live I'll have a new colony in no time.
 

stonynut

Member
i dont know the time table of this reaction... but i am guessing it isnt RTN... RTN will consume a coral in a matter of hours. if its happening longer than that... say over nite... or over a coupla days... .its what most people call STN. its the same thing, just a different amount of time. there is also shutdown reaction where the coral loses tissue across the whole coral at once instead of just an area here and there.
when you frag a necrosing coral... "over-frag" it... meaning even cut away a little into the healthy area. if you just cut away the dead part the necroses can still spread.
reason i said frog and flow above... hard to tell depth perception in pics, but it looks like the frogspawn could be reaching out and touching the acro.
reason i say flow... when corals start shutting down slowly from the base up, the coral usually isnt getting as much flow as it needs.... due to growth, new corals place near it, rock deflecting water, etc.
 

reefnut

Active Member
Thanks for the info... it did happen quickly. The first I noticed it was when these pictures were taken. When I went home at lunch I did notice it so it happened I think with in a few hours. I have seen one of my corals start to STN at the base due to lack of flow... that was a slow process and gave me time to react.
The FS is relatively close but again I have not noticed any damage other than that caused by the cap. I was hoping they would find neutral ground and stop harming each other...
 

reefnut

Active Member
Hmmmm... not sure then. It was in a awkward place so it is possible the flow wasn't good enough?? The cap could have been blocking the flow also... the way it grew that's very possible??
 

stonynut

Member
thats what i would guess happened to the base... but those top branches... i dunno
still speculation because i cant see the tank in 3D... but i wonder about the frog
 

reefnut

Active Member
I'll take a look at lunch and see if it's possible for the FS to touch it... I know sweepers could so who knows?? If so it's out of there...
 

stonynut

Member
LPS can be pretty amazing when protecting their territory
i had a hydno reach out a good 4" to sting an encrusting monti
in my 75g... i have a hammer and a bubble coral that put out sweepers a good 6" farther out than the main mass of the colony.
 

ssweet1

Member
I think it is the frog also, make sure you frag it immediately if you hope to save the rest. I HATE it when that happens. I lost a tort from a millepora touching it I think it was gone in 1 hour!! Carrie
 

reefnut

Active Member
Well, looking at this pic a little closer and it appears it could also be touching the cap so it's very possible...
 

beachbumtx

Member
Originally Posted by ReefNut
RTN=Rapid Tissue Neucrosis, many things cause it and it's difficult to stop. Basically the coral goes into complete failure and sheds its flesh.
Thanks! I have never had that happen in my tank, but I have seen it in our store tanks from time to time and never knew what it was called.
 

reefnut

Active Member
Hopefully you wont have to deal with it!! Sadly anyone keeping sps corals for any time comes across it. RTN and STN seems to be the largest disease that effects sps corals... problem is the cause can be many but the result is usually the same.
 
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