i wouldnt think it should not bother a snake. i always wondered if the pump would annoy the snake. i wanted to get one too. there are 2 kinds i have seen one theat is larger and wraped mostly in plastic, it comes with the pumps, and all you have to do is plug it in. i think it wa around 40 bucks, the only other kind i saw was from the makers of the little repti-den rockl that comes apart. it did not come with anything cept the structure, and it was like 25 bucks. smaller too i think. i have been thinking about getting a waterfall for sometime now, but decided not to due to the vibrations, and one of the snakes is afraid of water. when i mist the cage roo will hide. she hates water, and getting wet. i think i am going to get the ultra sonic fogger, and let that roll down like a waterfall..