Notice what looks like Aiptasia growing on a frag plug and sand this morning. What's the best way to get rid of it, pull plug out and glue? How about the one in the sand tweezer, vacuum?
APTASIA.
Its simple. . . with aa syringe, squirt either lemon juice or kalkwasser powder mixed into a runny paste and inject into core of the aptasia. they will melt away in front of you !!
If you can get the plug out, gluing over it completely is good. The one in the sand would be best to siphon or scoop out. Be careful because if crushed or pinched and even a fraction of the pedal disc at the base is left or sent into the water column it can spread.