Yea I was only curious after I saw that bowl for water, then I was speaking to another breeder awhile back and he mentioned it. So I was wondering if any others do this. I'm putting a bird bath in the back yard and I was going to put a few pennies in it to keep algae and stuff. But I'm likely not going to mess with it.
I generally change my snakes water out once or twice a week. I clean it with the chlorhexidine then rinse under warm water.