Help!! If Hydroids how to get rid of them!

[Ap 15]

I have a pic I noticed them after coming back from a vacation, and they were in between my Zoa colony here’s a pic

If they are hydroid PLS tell me how to get rid of them as they are annoying my Zoas

 

[Dread Pirate Dave]

I have a pic I noticed them after coming back from a vacation, and they were in between my Zoa colony here’s a pic

If they are hydroid PLS tell me how to get rid of them as they are annoying my Zoas

It would help to have a picture under white lite. As it is I can't tell for sure.