Good or bad?

[smt172]

I have recently lost three LPS corals and it isn't because of bad water parameters. However, tonight I found three of these white colored slugs moving throughout my live rock. I was able to remove one, that appears to be a snail/slug with a partial hard thin translucent flat shell on the body.
I have attached three pictures, two depict the white slug in the middle of the picture, the third is the one I removed. I apologize for the image quality of the in tank pics
Thanks for your assistance.


uView attachment 3898


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[Crooked Reef]

The one on the orange background looks like a stomatella snail. Beneficial detrivores. I wish I had some but they are harder to find in stores. Usually just hitchhike in. I can’t make out the white slugs. Look up flatworms though and see if they match. Most nudibranchs( slugs) that eat corals are obligate species eaters meaning the montipora ones eat montiporas. You can search Aeolid nudibranch and see what comes up. What coral specifically did you lose, how quickly and what did they look like as they were dying?

 

[Crooked Reef]

https://www.lionfishlair.com/hitchhikers-guide/ Review this link too. It has some great info.

 

[smt172]

I have lost a Green Torch, Octospawn, and a Hammer coral. The corals have been in my tank for months, and have suddenly turned to slimy brown, and separated from the hard skeleton base. This has been progressively slow, one at a time. All tank parameters have remained constant and at correct levels. Which I have confirmed with my LFS.


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[Tripod1404]

I have lost a Green Torch, Octospawn, and a Hammer coral. The corals have been in my tank for months, and have suddenly turned to slimy brown, and separated from the hard skeleton base. This has been progressively slow, one at a time. All tank parameters have remained constant and at correct levels. Which I have confirmed with my LFS.


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That is brown jelly disease. It is thought to be caused by a protozoan pathogen.


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[smt172]

Do you happen to have a suggestions on fixing that problem? Any help would be greatly appreciated.


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[billdogg]

IME, the best "cure" for brown jelly is to carefully siphon off as much of the affected tissue as possible (so it doesn't spread) and then cut off the affected head.

 

[Uncle99]

I run iodide at .03-.06, but not higher, consistently, since I did these 18 months ago, never had the problem again......iodide at this level acts as a weak disinfectant against bacterial infections, but not a perfect solution.

 

[Tripod1404]

I run iodide at .03-.06, but not higher, consistently, since I did these 18 months ago, never had the problem again......iodide at this level acts as a weak disinfectant against bacterial infections, but not a perfect solution.

At that concentration, I doubt it has any disinfectant properties. Natural surface seawater levels of iodine are already 0.04 to 0.06 ppm, if it was toxic to bacteria at that level, ocean would be sterile.

 

[Uncle99]

i agree, probably just coincidental.

 

[Crooked Reef]

Those corals are all in the euphylia family. I agree that it is brown jelly and had nothing to do with the stomatella.