haha im walking out of my bedroom and i saw something brown on the ground right in fornt of my little tank, and im assuming its a rock/piece of paper/string/whatever and i would have totally stepped on it and then it darted under my tank and im like wtf lol anyways, had some extra lace rock next to the tank and one quick smash worked well 
edit: oh and it was pretty fair sized, id say 2" ish
edit: oh and it was pretty fair sized, id say 2" ish














