brittle star losing legs

revjda

New Member
I have two brittle stars in my tank, purchased at the same time, nearly three years ago. They have been thriving and growing well until just a few days ago. I noticed yesterday that the largest one had lost a leg well into its central disc. Its color is good, dark green, except around the lost limb which is white. Orange "stuff" almost wormlike is coming out of the wound. I started to remove it from the tank when I noticed it was moving.
I called my LFS and talked to someone with lots of experience. He assured me that the leg will most likely regenerate. In fact, he had one that lost a leg well into the central part of the body and it still grew back. Today I noticed that the same brittle star had lost another leg. But what is even more disturbing is that the other brittle star I got at the same time is beginning to have the same problem.
The fish and corals in this tank are doing very well.
The only thing that I have done differently (about a week ago) was I used melafix to treat a fungus I noticed in the tank. Are brittle stars sensitive to melafix? I couldn't find any cautions about using this product with invertibrates. The other inverts in teh tank are doing well. And I have done the 25 percent water change recommended on the product label.
 

reefkprz

Active Member
brittle stars are sensitive to anything that affects the osmotic balance of the water, melafix increases waters surface tension, I would say it could be a case of osmotic shock. but I could be wrong.
 
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