How to remove Colt coral from tank?

[balistidae]

Just wondering if anybody had any tricks on how to remove colt-coral from an aquarium?
My tank is quite full of the stuff and would like to remove it completely as it is just too much of a hastle to keep in check.

I have tried removing the rock and cutting the colt out with a razor blade as close to the rock as possible but it still comes back, even from just a few cells on the rock. Im wondering if I maybe superglued the remaining tissue if that might stop it from coming back?

Any tips greatly appreciated! Anybody in the Calgary area interested in some free colt stay tuned...