Help! Happened overnight

[acabgd]

First time I see something like this. Happened overnight, this morning when I woke up this is what I saw!



Any ideas on what it might be?

Parameters:
Am/Nitri 0
Nitrates 3
PO4 0.04
kH 7.0
Cal 400
Mg 1370
Sg 1.0262
Temp: 78.8

60g custom, Tunze 6055, WP-25

 

[ssscuz]

What have you changed in the last week? Had you done a water change lately?

Any coral gobies in there? Almost looks like the flesh has been eaten off rather than rtn

 

[madweazl]

Coral goby?

 

[acabgd]

Seems to me as well, but eaten by what?
No water changes lately, normal dosing only - carbonates and calcium, as usual. I did add a few corals, including SPS within the last week.

No goby in the tank, only 2 fishes are the two clowns. I do have a small crab which I happened to see a few nights ago (came with a new piece of LR I introduced about 2 months ago).

 

[Art13]

I had issues with my emeralds trying to eat my sps, i caught one of them one night going for my green stag, i had to pull them all out of the tank and give them away as i'm not going to take that chance. If you have a sump might try and catch him and throw him in there, see if it stops.

 

[acabgd]

I will, I don't even know what kind of a crab it is, only that it's small, like 1-1.5". I mainly wanted to check with you guys as this doesn't seem like RTN to me, but rather that it was really eaten.

Any other bugs I should be looking for?

 

[EddieJ]

I had a Scripps Stag RTN starting that exact way, and this was in a frag tank without any crabs/snails/fish.

 

[Reefer1225]

Looks like something is stinging it? What is that in the bottom surrounding it? Macro algae? Aiptasia? Polyps? Is that a frogspawn need to it?

 

[acabgd]

Looks like something is stinging it? What is that in the bottom surrounding it? Macro algae? Aiptasia? Polyps? Is that a frogspawn need to it?

That on the bottom is Caluerpa. It was there from the beginning, never caused a problem.

To the right are some Palys, also there from the beginning, also never caused a problem.

I now notice some of the things are closed - zoas, acans, frogspawns, toadstools... Might be due to darkness (lights didn't come on yet), or maybe something chemical really did get into the aquarium. This is the only thing I can think of...

I put a reactor with carbon this afternoon in order to try to help, but it's apparently wait and see...

 

[stevedola]

is it spreading? super gluing the affected area could stop the recession

 

[Wrench]

That looks like a sting to me. I'd bet good money that at night the paly to the right stretched out a bit and stund the digitata. I've seen palys extend waaaaaay out at night. Fish predation leaves smaller bite marks. Water chemistry issues usually start at either the base or the tip and move inward.

 

[acabgd]

No, I wouldn't say it spread during the day, at least not visibly when comparing to the photo above.
Would you really say palys can extend that much? Photo is distorting the perspective, Palys are closer to the camera and are some good 2" away from this affected area.

 

[toothman]

probably from the aiptasia stinging it.

 

[acabgd]

probably from the aiptasia stinging it.

There is no aiptasia there at all?

 

[AbrahamS]

Looks like rtn how is your flow?

its seems like a monti digitata with RTN
was having the same problem and i just change them to another place with less flow, try it and if the RTN continiue you will need to frag them to stop it

 

[rworegon]

Your alk is 7? has it been steady there for a while? Alk swings can do funny things, usually bad.

 

[acabgd]

Looks like rtn how is your flow?

its seems like a monti digitata with RTN
was having the same problem and i just change them to another place with less flow, try it and if the RTN continiue you will need to frag them to stop it

Hmm... Funny that you say that - I did add the WP-25 just last week. However, this happened overnight. Would you say it could be the flow?

 

[acabgd]

Your alk is 7? has it been steady there for a while? Alk swings can do funny things, usually bad.

Actually dropped to 6.5, but over the course of the last week. Dosing regularly, missed that I needed to somewhat increase the dose due to new coral added. But the swing was mininal and not overnight.

 

[AbrahamS]

Hmm... Funny that you say that - I did add the WP-25 just last week. However, this happened overnight. Would you say it could be the flow?

probably....

That happened to me....is not an immediate change .... going slowly closing

after that the RTN starts try to replace it, put it in another side of the tank

 

[Aqualund]

what kind of light do you have?

If you are using leds with just royal blue and cool white, that is your problem.

If not, these corals can also be sensitive to however youre dosing your alkalinity...a misplace drip or two can make them rtn overnight.

dunno, but when i experienced losses in the early days for pocillipora and seriatopora, these two were the causes for me.