Need acan help

[vessxpress1]

Has anybody experienced extremely fast damage occuring to their acan lords where just the center tissue is gone and the outside ring of tissue is left in tact?

For some reason this keeps happening to me and it worries me. It happened to two polyps on my nicest frag one time and I thought it was the peppermint shrimp. I've since gotten rid of them. The two polyps have grown back like new again, thankfully.

Now, I have a different frag where the tissue is just gone out of the center over night and you can see the skeleton while the ring of tissue around the edge is left in tact, once again. I have quite a few now and no other ones are showing any stress. It's just one polyp and it's not from another agressive coral. The rest of the frag looks great.

Not much around it and it is glued on it's side, facing the front glass, in the top 1/3 of the tank under T-5s. Moderate flow going by it.

 

[mikekman]

Any pics?

Do you have any pests that you know of? Chocolate chip starfish or maybe a euncid worm that comes out at night and is eating them???

Mike

 

[vessxpress1]

Nope. No CC starfish. Don't know of any pests. I have moonlights on the tank and I've looked at it many times with a flashlight and I've never noticed anything.

I believe it has something to do with the coral since the edges are always untouched and just the center deteriorates. I could be wrong though.

 

[chrisstie]

Do you have any corals in your tank that could be doing the chemical warfare thing? The fact that the center is deteriorating is strange, but its also where the mouth and "guts" of the coral are. If it is ingesting some kind of toxin being put off by another (usually softies do this, and some others) perhaps its not quite killing the coral but causing damage where contact was made?

Just athought, though I've never really seen anything like that or this go on. Have tried to be careful with mixed reefs.

 

[Hogfish77]

Similar thing happened to my Blastos. Just that the mouth receded first and the rest started as well...only skeleton left. I think maybe my flame angel had picked the mouth apart? But who knows, all my dwarf angels are gone now! Your acan incident is weird too.