Not sure what this is

[garypalmer12]

Can anybody tell me what this green tube stuff is. Thanks

http://tapatalk.imageshack.com/v2/15/01/19/f8d7bde594f1e0ee615de772525ee76b.jpg

[Michael Hoaster]

Looks like chaeto. It's a great nutrient uptake algae that lots of folks put in their refugiums.

[FinzAquatics]

id say chaetomorpha as well