Incredibly low sample size, but I tried it for a few months with one snake and didn't notice a difference. I'm also changing the water every 48 hours without fail so that could be undermining any benefit as others in the thread suspect. I also didn't see the color change that was supposed to happen when she pooped/peed in the water so I'll probably discontinue. In short, I doubt it hurts, but not really seeing any benefit over just changing it frequently.