From an old fish keeper--put down a piece of vinyl, etc, and put your decorative pad on top. But splashes and leaks will STILL happen. And from an old fish lover--get your betta out of that fish prison and into a larger tank. Despite now these lovely fish are displayed for sale and the inadequate containers sold by pet stores .they deserve better treatment. You can keep a cat or dog alive in a crate but I bet you wouldn't do it. Please, please use your computer to find reputable betta care.