Yea, it's really impressive how much information there is on this board and how the more experienced folks continually share info with noobs like us.Great! Thank you for replying. I dug a little bit deeper while awaiting a reply and found a wealth of information. Basically, I believe, based on what you put in your tank it’s a matter of opinion and establishment. Being as this was our first go around with a living vivarium, we went about as basic as you can. I used the basic exo-terra background, PVC, window screen, pea gravel, a mix of eco dirt and pre mixed leaf litter substrate from a local breeder, and pre cured plants. Everything was sterilized with a 5% bleach solution and put together. I also got a culture of pink springtails from the local breeder and started half of the culture in the vivarium and am starting the other half as a bigger culture to add in later. I am so excited and all the information on here is amazing!