I've never heard that, but cypress is good to use to boost up humidity. I only use it for my Blood pythons, however I have used it once before with one of my Ball pythons. I didn't like it since it dried out quickly (I had her in a tank with a screen sliding lid and a heat lamp, so that's why. I keep them in tubs now), but works very great with humidity which is why I use it for my Bloods.