Black dots on SPS.

[Maxx Yung]

Title says it. Could be flatworms.

 

[Tahoe61]

Does not look like FW to me.

Try using a turkey baster and blowing it off.

Is the unknown on all types of sps in the tank, like acropora as well as pocillopora.

 

[Maxx Yung]

It's only on 2. Birdnest

 

[lwmnfrvr]

I have the same issue on a Rainbow Digi, and a Montipora Setosa. The black spots do not blow off.