Clear flowery growth on rock?

[Aldrinlights]

This stuff is hard to get a picture of. It's kind of pretty too. Is it a pest? I can't find any info on it. I thought it was another type of filter feeder but of course I have no clue. It's the clear cluster of things sticking out in the center of this picture.

 

[eggplantparrot]

possibly colonial hydroids?

 

[duberii]

I agree some type of hydroid

 

[Billdogg]

^^^My guess as well^^^

If so, they will go away on their own.

 

[king aiptasia]

^^^My guess as well^^^

If so, they will go away on their own.

yeah most species are kinda hard to keep in significant number a standard system