ID needed

[Myka]

Click on the link in my signature for help with the bryopsis.

Hydroids are a pain in the butt. Sometimes they spread quickly and really cause problems by stinging their neighbours. Ime, they don't spread very fast at all though. I have a few patches in my reef, and I just use boiling water in a syringe they I slowly release onto the hydroids to get them real good. That's about all I know of to control them. Some people say Butterflyfish will eat them, but I have yet to see that myself.

Originally Posted by monocus

#4 is a spiny oyster-helps filter water

Sorry, but that is not a spiny oyster.