Hey guys! How's it going? I have me about a 14'' savannah monitor that I have in a 55gal right now. I have had top soil as the substrate ever since I got her. I heard they like to burrow a lot, dig etc, but she never does. I am moving her into her permanent 6ft x 6ft x 3ft enclosure and was wondering if I should stick with top soil. The cage is built out of mdf, with a plexiglass front and has lenolium for the floor and half the walls, mainly for moisture, spills and cleaning etc. What works the best? Can I mix top soil and aspen?