My girlfriend and I are working on a little 2 tank setup. We will have matching heating panels and matching UTH, but my tank is 6 inches taller than hers for now. In a year or so she will have the same tank as I. Which version of the herpstat will I need to make this as simple as possible, and what would I need to make it work? It seems a little silly to have 4 t-stats when I see a video of a guy running 3 racks off of one herpstat 4