Black spots on coral & rock

[BelleReef]

There are a bunch of black spots that appeared on my rock and coral over the weekend. I think they might be black sponge but I’m not sure. Should I peroxide dip or will that harm the coral? (Coral is some type of NPS I got for cheap at LFS)

 

[vetteguy53081]

May be black sponge
Try blowing loose with a turkey baster. If it remains- likely sponge

 

[BelleReef]

May be black sponge
Try blowing loose with a turkey baster. If it remains- likely sponge

Yes it stays when blowing on it

 

[vetteguy53081]

Probably sponge
Black and yellow undesired- you can inject via syringe:
Air
Hot water
Vinegar

which will get rid of it

 

[Teen reefer]

Probably a type of black sponge or algae.

 

[ejf_18]

May be black sponge
Try blowing loose with a turkey baster. If it remains- likely sponge

 

[ejf_18]

I’m also having issues and it doesn’t blow off with Turkey baster