Originally Posted by jphendren
... Should I just pull those rocks and let them dry out? ...
If you don't mind killing off whatever else is on the rock, that would definitely do the job!
Other option is to take the rock out and using a screwdriver try and pop that chunk of rock loose from the main part of the rock - removing the aiptasia along with its foot and the rock it's attached to. Do NOT try to scrape the aiptasia off... that will make matters worse. You want to remove the entire piece.
Since you're just starting to cycle the tank, I'd take care of it outside of the tank and not let it reproduce during your cycle. The ammonia/nitrites won't even make it flinch, let alone kill it.