Hydroid or aiptasia?

[Drummond]

Any idea what these are? Are they bad? If so do I need to kill them somehow?

 

[Drummond]

I'm guessing aiptasia because they suck in when you touch them. I haven't added anything to the aquarium in over a year. I had to dose with Furan-2 a couple of weeks ago and then they appeared.

 

[cloak]

Colonial Hydroids.

http://www.lionfishlair.com/hitchhiker.shtml

 

[Drummond]

Colonial Hydroids.

http://www.lionfishlair.com/hitchhiker.shtml

Yep, that's them. I wonder if the Furan had something to do with them?

 

[SoloGarth]

Just remove the rock if possible. Hydroids are a lot easier to kill than aiptasia. They can't totally disappear into the Rock. Best to deal with them early though

 

[cloak]

Another option is to just smother them with some epoxy. It would basically be like covering them up with chewed bubble gum. GL.

 

[Drummond]

Can I just put them in a bucket with RODI for a week or two and then recure them?

 

[salty joe]

Another option is to just smother them with some epoxy. It would basically be like covering them up with chewed bubble gum. GL.

Or how about smothering with kalk paste?

 

[reefer1970]

check into whether or not Joes Juice or boiling water injected into hydroids would work