I agree with fishmommy, the reason most people don't do this is it'll become mildewy and moldy quickly, algae will build up. You'd have to make something that's completely removable, and if you didn't want to change the water all the time and scrub it you'd have to invest in a really great filter that somehow wouldn't affect the snake, I mean he/she couldn't dig it up or break it and hurt them self on.