I just love these things!! When I got my first scorp at repticon, the 3 gallon of what I brought home with her. I have a smaller one for the 1 scorpling that I kept (21 others donated) I used a 12x24x6 one to successfully raise 22 scorplings and find homes for them with zero cases of cannibalism and zero fatalities. http://www.deepblueprofessional.com/terra-blue.html The repti-lock gives me much peace of mind. I know the cat won't get to it.