When I first bought my lizard I was told to get a bag of calci-sand. Which I now know isn't the healthiest thing for my uro. I'm looking to change it out to a sand/ soil mix. My aquarium is split roughly 40% sand and 60% slate tile. I have bought 2 bags of Paverstone brand play sand so far, but I am clueless as to what type of soil to mix it with and was wondering if anybody has had any experience with Paverstone play sand.