I have seen the laser method in a video...you must keep inmind that the laser capable if killing aquarium pests can also destroy your eyes....not worth the risk if you ask me.
First time we have ever agreed.Ok fellas , wicked lasers makes lasers that can burn wood , paper and plastic however like stated before!!! Lasers.can bounce from glass at certain unknown angles and the effects can be irreversible if it hits your eyes !!! Look for another way or it will cost you more than U think!!!