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what is this?


new55galSALT

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I was reading on here that there is something killing sps .... as my tank can never grow sps i have one small colony of birdsnest...

So inspecting my tank i saw this thing on my colony i poked it with my grabber claw seems to have a hard cocoon but it looks like it casts a net over my birdsnet and i just saw it pull in this net thing and then poop... is it killing my sps or just my sps bad luck..

It is a cell phone picture but it shows the net thing click to zoom if needed

post-2343-0-72818900-1357976618_thumb.jp

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The net you're describing has me inclined to say it's a vermetid snail. You can get rid of them temporarily (kill just the ones you treat) with a dot of superglue gel or coral glue to cover the end of the tube. Generally, they will decrease in number if you work on less frequent feedings (starving them out).

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Yeah, they won't move. They have a calcified/hard tube, and every now and again will let out a mucus feeding net. If its right next to your birds nest, it could be stealing the food and nutrients from the birds nest. And I think the mucus in general might irritate the birdsnest polyps and cause them to retract constantly.

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I agree with ClarkiiCircus and (Bio)3 Some people don't like them and large populations have been shown to irritate corals with the slime "fishing strings" they produce but I've never had a problem with them and actually consider a few of them beneficial components of a healthy ecosystem. Unless you literally have slime sheets being formed by them I would not attribute them to causing your problems with SPS.

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