ID stuff on my live rock

[James butchart]

Hi I have started getting a break out tiny white stuff on my live rock.
I'm sure someone can identify it for me and what would be the best way to get rid of it or is natural to have it.
Cheers

 

[NemHost]

Looks like hydroids. I know reefers who have had hydroids for years without any issues but you’ll also find others who say it’s the plague. They could irritate corals but I’m not sure that they physically damage them. In many cases it seems that they go away in time or their population size stabilizes. If it were my tank, I’d try to remove them and/or place glue over them. If all else fails and you really want to get rid of them, you could use fenbendazole. There are a few threads here on using this medication.

 

[James butchart]

Thanka for the reply.
Is there any clean up crew that sorts it out. If not i'l leave it and see how it goes don't really want to start putting meds in the water.