I use Dri-Dek on top of either newspaper or paper towels. It's impregnated with antimicrobial coating and the liquid in the urates drains to the paper on the bottom of the tank, so my angels don't fingerpaint with their pee until I can clean. Also no worries at all of anything getting stuck/ingested. It's also great for feeding in the tank, again nothing gets stuck to the prey. I love it!