STN, RTN causes/cures!!!

Causes would be often user-inflicted.

While it can happen without an explanation we can pin, IMO it's often associated with multiple stress factors [parameters off, Alk/pH high/low, temp high, swinging parameters, etc].
 
Like Mark stated....stress is usually the cause or at least weakens the coral to a point microbes etc... can take over and do their damage.

IME the two most common causes of RTN are alk or temp spikes and the most common causes of STN are lack of flow(possible allelopathic contributions) or chronic high or low alk levels. Improper use of phosphate removers also seems to be fairly common IMO.

hth, Chris
 
Yeah, Im thinking its been my ALK thats caused this crazy Euphyllia problem in my tank...

Ive not been watching it close enough...

makes sence...


Hopefully dripping KALK again will help stabilize everything.
 
You are forgetting about disease. You can have an aquarium years old, loaded with Acropora until that one last frag that has a pathogen is added. It dies along with the rest of your prized colonies in less then two weeks. Im not talking about those stupid "red bugs" everybody thinks is a problem, they donââ"šÂ¬Ã¢"žÂ¢t compare to this, this actually is a problem.

Fraging a coral wonââ"šÂ¬Ã¢"žÂ¢t actually work with this, its in your tank and all the polyps have been exposed.
 
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WELL THANKS FOR THE INCOURAGEMENT THERE BUD!

.. anyway!... Yes This is a possibility, but considering its ONLY effecting 2 of 3 Euphyllias in my tank... Im hopeing it was a stress thing and not a pathogen...
 
RTN and STN occur with sps not LPS. In the case of your euphyllia(I assume this is the one you posted about in the LPS forum) it would not be either of those and would most likely be a pathogen(more likely) or tank condition(not as likely since your other corals are doing "fine" ) causing the problem.
hth, Chris
 
I've got a horn coral frag that was suffering from RTN (what I thought was) and my perameters were skippy. I fragged, treated with iodine for about three weeks and gave up. He got knocked to the bottom of the tank one night and I left him, he has since recovered and doing great! I'm linking it to a bulb change about a month prior, I went from 6 month old 10k to new 20k.
 
Just want to throw this out there, RTN can look very similar to HLLE in fish. Since HLLE is supposidly caused by a lack of vitamin A and C in fish food, anyone ever consider the possibility of a healthy frag that all of a sudden starts to RTN without obvious cause, may have a crapy diet/lack of vitamins? I think it is a possibility, since we can never offer the huge variety of zooplankton available in the sea to the corals in our tanks.
 
sux

sux

Two new mille colonies I just got are suffering, from this, but I think it has more to do with too much laminar flow pointed at their vicinity, basically tearing their flesh off from very high flow. (Tunze 6060) in a 55g.

David
 
Lets not kid ourselves, we have not scratched the surface of our hobby, which is why I like it so much. And why I get so irriataed when people speak in absolutes. Polyp bail out and RTN/STN are different, possibly connected in the long run, but SPS are for sure more sensititive.....Frag em and chuck the dead stuff.....to be honest, no one knows what causes it yet for certain...YET!!!

Personaly I think it is a reaction to some bacterial, infection similar to a mass exodus

Knock on wood, the only RTN I have experienced was the first two colonies I purchased, and had NO clue about controlling my Alk.....after months of tighting my regement, and some 20 frags later, I have had no RTN or losses since then....

I practice the let them slime and dunk acclimation reglarly...which further makes me believe, they are more sensitive to unstable conditions which lead to outbreaks.
 
(not as likely since your other corals are doing "fine" )
Click to expand...

Glad you did the whole... "fine" thing... I should clarify...
my other corals are doing more than fine... they have wonderful PE, and growth... I suppose some would say they are flourishing.


My Green Goni has grown alot since I purchased it, which was... I believe ... well I have had it for a while.. Id have to go check exactly how long.. anyway...

Not haveing a problem growing SPS at all... my acros, which are Blue Tort and a Neon green/lavendar tipped acro .. as well as all my montis and birdsnest and hydno are doing very well.. growing and such...


Like I said its just these euphyllias..
 
RTN is often crytpic in that it happens for no apparent reason. To generalize and say it's mitigated by a bacterial pathogen is kind of assumptory. Frags or colonies that appear fine one day can be gone the next in systems that have had nothing put into them for several months. Pathogens are not at all likely in these cases.

IMO, the bacterial vector was an assumption made long ago that might apply in a few select cases - but not even close to the majority. In a closed system, if you subject corals to a pathogen that can kill a colony overnight, your whole tank (by all means) should be mostly toast in 24 hours. That rarely happens...My experiences with RTN have been with a single frag or colony per episode. I think that's more typical than exceptional. FWIW, the Vibrio cultured by Bingman has been found on most healthy corals IIRC...and that article is almost 10 years old!! ;) You'd think in 9 years this would be common knowledge if it were the main causative agent. :confused:

It's little more than a shutdown reaction - in most cases - and IMO. :)
 
I am trying this

I am trying this

I am running ozone more frequently, and I did add some antibitotics to my tank, as an trial/attempt to rid one of my corals of rtn, but It's not doing anything. I think Gmoney is right, its just a shutdown reaction, I find it only happens with wild captured corals, and not with aqaucultured corals. I think wc have a harder time adjusting and can rtn without cause, just imo..

David
 
To rid one of your corals of RTN?

You can't really rid a coral of RTN. If it takes more than a day to kill the colony, it wasnt RTN.
 
OH GAH,,, to my horor I found something today!

I have had a dinoflag problem and lately Ive been reading up on it and been reading where it starts to mat when Temps are cooler...

I was shocked to see what I did when I looked down in my sump...

TO MY HORRORRRRRRRRRR....

My glass heater had busted and filled with saltwater while STILL PLUGGED IN!!.. this scarred me ... the water inside was brown and rusty...

I am scared that the cause of my problem lately was due to excess Iron ???


LOL! But thats probably why my Green Goni Stokesi is thriveing! hahahaha!!!

anyway...


could this have been a huge problem????
 
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