While substrate is mentioned in many threads there hasn't been a dedicated thread since 2012. Things can change in all animal husbandry, so rather than revive the old one , I thought I'd start a new dedicated thread and incorporate a poll. Indicate the components you use on the poll, but in the comments it would be great if you could include details of which specific group/genus/species/stage of tarantula you are tailoring to. Please include as many details as you can about both the substrate and tarantula catered for. I hope this will become a valuable resource for anyone setting up a new enclosure.