Advertisement So I managed to pick up a 29 gallon aquarium (30" x 12" x 18"H) today on the cheap, and I'm planning on making it into a vivarium for an Asian forest scorpion (specifically a type native to Vietnam, but I'm not sure on the type of Heterometrus). I know this is maybe overkill for meeting the needs of the scorpion, but I want to have a nice looking vivarium for my room while making sure I'm not sacrificing any of the scorp's needs. So my questions were for my false bottom I'm planning on using Hydroballs (specifically zoo med if it matters), and an abg substrate, as I want this to be a bioactive vivarium. I'm curious to know if anyone can help me figure out about how much hydroballs/substrate I will need to properly fill a 30" x 12" space. I'm planning on making the substrate anywhere from 4-6" deep. Also I was wondering what the best heating solution might be for my tank. I've heard mixed things about heating pads, but I am not sure if I will have enough room on top of the vivarium for a ceramic builb, as its placed underneath a cabinet to discourage my cat from breaking into the top. Adding that I do not yet have the scorp, I wanted to make sure I was set and ready with proper tank before I pick one up. First time owner.