Brown Hydroids

[MarkoD]

ok here are the pictures.

they seem to close up when shaded, they kind of react like a clam

[MarkoD]

the tube is flexible and not rigid

[toytech]

Soft tubed feather dusters , same as the ones in my sump to a T .

[MarkoD]

How do I get rid of them?

[don.ald]

I don't think you can simply get rid of them? I'm fortunate since my blue clove infestation hides them

[MarkoD]

Originally Posted by don.ald

I don't think you can simply get rid of them? I'm fortunate since my blue clove infestation hides them

These thing seem to be growing on and around zoas which is causing them to close up

[toytech]

Copperband butterfly , and some wrasses eat them ( cant remember what kind)

[don.ald]

Bite the bullet and pull the rock make the change ASAP, they will multiply

[Coasting]

Yup those are just feather dusters.
You could just glue over the ones that are causing problems but their generally harmless.
Or you could try dosing the tank with PraziPro... Since it kills parasites and worms, one of the reef tank side effects is that feather dusters typically die with its use since they are worms... however don't know if you have other critters in your tank that could be negatively impacted by this.
http://www.hikariusa.com/solutions/healthaid/prazipro/

[MarkoD]

Originally Posted by don.ald

Bite the bullet and pull the rock make the change ASAP, they will multiply

It's a big rock. If I pull it out I'll lose about 2 grand worth of sps and zoas