#ed_op#DIV#ed_cl#There are these hard tube shaped growths about 1/2 inch long that seem to grow on the rocks. As far as I can tell there is nothing in them just an empty tube. What are they? What should I do about them? Are they good/bad/indifferent? #ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#IMG alt="image file name: 2kbc70ba85e4.jpg" src="http://www.captivereefing.com/richedit/upload/2kbc70ba85e4.jpg" border=0#ed_cl##ed_op#/DIV#ed_cl#
I think I have something similar except mine have two very thin, clear antennae type things coming out of them. But mine aren't quite that big yet. I really didn't think much of them until I saw your post. Now you have me curious.
vermitted snails... do a google. They are completely harmless except when they send out their feeding web(looks like a spider web) and it coats some corals.
Tough to tell but I would guess tube worms or spaghetti worms. Both make tubes. Both are reef safe. Tube worms will have fan shaped head that retracts with movement or light. Spaghetti worms will have a long, very thin whitish tentacle that it extents out looking for food. Just keep an eye on them.
If you see them showing up in a steady progression thoughout the tank, it could be a sign of too much food(nutrients) and be a red flag to back off feeding as much or as often.
For feeding i just make shear that Thea eat all i put in don't wont it to go to the bottom of tank. if careful you can feed ever day i feed ever other day