For goodness sakes...be careful out there! LOL
All kidding aside and I'm no girl scout, however, if you look what it does to whatever you point it at, just be sure to be extra careful when using it. It would be pretty horrific if something happened to the user just because of a nuisance in the tank but also think how you would feel for the rest of your life if you damaged someones eye that just happened to be in the room as an over-sight to the user. Keep in mind that a reflection of the laser can be just as damaging as a direct hit. As far as it accidentally getting in the hands of a child.....Well you know the rest
$0.02 Disclaimer over...Carry on