Rex's tank = DIYS Perspex with timber frame tank , bedding = old pre-used ceramic wall tiles loosely laid with paper toweling under her salad bowl.
Peppa and Toothless are still in their 100L clear plastic stackable rearing tubs, paper towels for bedding.
George and Mildred (Bluetongue skinks) in DIYS Perspex with timber frame double decker , bedding = mix of course Kritter's Krumble + natural leaf litter (collected from my front yard from under my big bluegum tree) , they love burrowing through the fibrous bedding and often make a nest to sleep in rather than their half log hides overnight.
When I had water skinks it was 100L tub during the day, with bedding of mixture of playsand + medium Kritters Krumble + gum leaf litter + some lawn clippings , they love burrowing . Bed-tub was a separate 10L tub with paper toweling bedding and lots of different levels to encourage exploring (I'd regularly rearrange this - and they really enjoyed exploring the new layout)... They also liked a smaller tub to sleep in , or watch us from while on the coffee table with their lid off or to watch tv from.