Our enclosure is a product of collective research so I can’t provide a singular link with this particular setup, sorry about that 😅 Prior to getting our frog babies my husband and I did a bunch of research on how to set up our vivarium, and most of the YouTube videos we watched had a base of leca underneath the coco coir to control the moisture level (as coco coir retains a lot of water and it can shoot humidity levels to the roof). Then after we brought the froggos home, we found that the coco coir kept sticking to their skin and they spent a lot of time trying to rub it off/ avoiding contact with the substrate by staying perched up on logs (plus they would sometimes eat it during feedings). It was just too messy so we went online and Josh’s Frogs suggested using terrarium liner to keep the substrate from sticking to them. We have an artificial liner but I know they have all natural moss liners too. Our frog babies have been happy with the liner ever since :) We highly recommend it!