What are these as well? Look like worms, but...?

[flanque]

These are all over my tank... not a plague, but there are many. Some of them also have a string of slime joining them together which is freely moving around in the current.

 

[datto]

can you take a better quality photo or do you have any others which are clearer cause its a little hard to tell what they are....

 

[flanque]

Yeah I supose I could, but it's hard as my camera has trouble focusing at such close range even on macro settings.

I'm sure you can help me identify them in other ways, right?

 

[Fluff]

It's a type of tube worm (polychaete),. They are harmless and use their tentacles to consume detritus. They are a great addition to your tank.

 

[steve-s]

They sound like Vermetid snails...

Cheers
Steve

 

[Bang Guy]

What Steve said...

 

[Brad]

I don't think snail. I think those are fixed in place. They form a thick calcarous tube and have small short tentacles coming out. The exude a mucous. I think that is what they are because I have a couple in my tank.

Having said all that...I don't really know what they are.

 

[steve-s]

I don't think snail. I think those are fixed in place.

They are.... it's the slime that's moving.

Some of them also have a string of slime joining them together which is freely moving around in the current.

http://www.reefkeeping.com/issues/2005-01/rs/

Cheers
Steve