Sean,

I just looked at the rock I bathed in kalk/RO and there are signs that some coralline has survived. If you are going to kill the rock, either by kalk bath or boiling, I think you will have more thorough results with boiling. Aptasia are demons, ime, and boiling would probably be the better way to go. Remember, you are gonna KILL EVERYTHING by boiling.

I think my plan of action is to try the kalk bath and to syringe the ones bigenough. and hopefully my CBB will take care of any that survive.

Any rocks that get the kalk bath will have be to be re-cured in a separate tank other than the display tank.