What are these ?

[Kev's reef]

Been recently seeing more of these thing popping up in the tank don’t know what they are they just look like little barnacles to me. Is there any way to get rid of them?

 

[nightmarepl]

Been recently seeing more of these thing popping up in the tank don’t know what they are they just look like little barnacles to me. Is there any way to get rid of them?View attachment 25647

looks like coraline algae honestly is it hard and doesnt move?

 

[diana a]

If you are referring to the white objects on the black rubber, those are called Spirorbid feather dusters

 

[Wilson]

For the most part harmless, but unsightly. Manual removal and reduce feeding..

 

[Kev's reef]

Yeah they are starting to cover my rock and it’s just getting annoying

 

[DangerDave]

Their population in your reef will ebb and flow based on available nutrients. They’re harmless.