Rapid Tissue Necrosis???

[jaxcarnage]

If this is RTN this is no joke, this all happened with 48 hrs. I've had this piece for well over 1 year, yesterday night half of my strawberry shortcake 3 x 6 mini colony was half bleached. I thought I can save it, took it out and started to frag above bleached areas and dipped them in Revive. I don't have two tanks to quarantine so I put them back into the main display. Today I woke up only to see all the frags were completely bleached. There has been no spikes besides NO3 slowly dropping down to undetectable levels for the past month which I'm working on raising by feeding more at the moment. All other corals in the tank seem okay

4 week readings (Trident & Hanna)
ALK 9-9.2
Cal 450-440
Mag 1400-1468
NO3 0 (aim to have it at 10)
PO4 .07-.11 (average is above .1, struggle to keep it under .05)

For those who have experience RTN what could've I done better? if anything
Should I be doing a water change?

I understand this is part of the hobby which sucks (sorry for not taking pictures of the half bleached coral but that wasn't even a thought at the moment)

 

[Dipan00]

Man that sucks. I feel like sometimes it just happens. I have had stuff die as well after thriving for years. Maybe worth sending in an ICP test to see if there is anything else that may give you a clue to whats going on. From what your parameters show nothing stands out as an issue.

Sent from my SM-G998U1 using Tapatalk

 

[OGFrenchHorn]

Have you taken par readings in your tank? Maybe too much light for it.


Sent from my iPhone using Tapatalk Pro

 

[Fon]

Has anyone noticed that RTN happen more often during the summer months ? Could this be a natural process ?

 

[jaxcarnage]

Have you taken par readings in your tank? Maybe too much light for it.


Sent from my iPhone using Tapatalk Pro

No, I just set my radion to 50-55% intensity since initial set up.

taking par readings has been on my task list

 

[lazycouch]

based off your current nitrate levels, and your desired nitrate levels, it is possible you could have raised them at some point and they were depleted in a short period of time. it could also have been caused by lack of nitrates as they depleted over time, especially with the imbalance between nitrate and phosphate. corals wont always react to something bad overnight, so it could have been a build up of things altogether

 

[OGFrenchHorn]

Let me know if you need nitrate. I made my own solution when I needed to raise mine. OG NO3! Lol


Sent from my iPhone using Tapatalk Pro

 

[Smite]

Has anyone noticed that RTN happen more often during the summer months ? Could this be a natural process ?

Could be temperatures get a little higher. ph drops from windows closed/AC on. Water districts adding more chloramine ect to water supplies in hotter months sometimes as well.


Sorry to hear about the losses jaxcarnage. With a whole tank event I'd for sure do a ATI ICP. ATI tests your RODI water as well. With your testable values looking okay, I'd be suspecting something with your top off/fresh saltwater. Sometimes the TDS meter cant read low enough to completely rely on in my experience.

 

[wsoldier]

Sorry to hear man. As Dipan suggested, I think an ICP might be a good way to go. I lost a bunch of mature colonies to super high Tin levels that I never would have caught through regular observation but I saw with the ICP.

Good luck and keep us posted!

 

[joseserrano]

Doubt it was nitrates/“low nutrients”. Too long of a spam for it to affect it so quickly. I run all my tanks at almost undetectable. Could have been a flow issue. Collected detritus/waste that rotted it from inside out. Happens when things start to get bigger. Could if also been stung by a rough something and opened it up to rtn. It’s difficult to narrow down things when there are many other pieces in the tank doing absolutely fine.

 

[jaxcarnage]

Water results are back. I'm be over analyzing them this week

 

[Smite]

Tin is something I've had present when my tank was having issues with TN. I never really pin pointed the cause unfortunately. I wonder where the cobalt is coming from?

 

[Smite]

That's a pretty low iodide value too

 

[wsoldier]

I didn't notice an smoking gun from the results. When I had high tin, it was from using vinyl braided tubing from Home Depot, and it shot up to over 100 ug/L in a month. Mine is under 5 ug/L for most of the year currently and most everything except for torches are doing well.

You could always do a large series of water changes to reset the tank. That's what I had to do to get rid of the tin.. maybe 6-8 x 40% water changes over the course of a few weeks.