the exo terra waterfalls sure look nifty, and i liked the sound of the running water, but to be honest, it was the worst PITA EVER to clean! when i had one for my cornsnakes viv i had to clean it at least once a week, which involved unplugging it and digging it up form the aspen and unweaving it through all the hides/vines etc. i really hated it and stopped using it after about 2 months.