I have 2. Yea, it's probably an overkill, but one small one on the cool side and one large enough for my snake to soak in on the warm side. It helps with humidity as well as drinking and soaking. No, my snake rarely gets in it, but it's there if she decides to. Most folks with multiple snake don't do this, but it's not too much trouble with a small collection. I tend to go to extremes with mine.