Trying to ID something growing in tank

c2fish

Reefing newb
I have a 75 gal reef tank that has been giving us fits since setting it up two years ago. After dealing with the red slime now I have small clusters of small brown pebbles growing out of the live rock, they are similar in appearance to my bubble coral only brown and under blue light they are speckled with a bright red dots. I have no clue as to what it is and it is in about 4 locations.
 
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