Just curious why don't you want a rack system? You are going to price yourself into one by buying multiple thermostats, heating mats and supplies.. Don't get me wrong, I don't have a problem with aquariums that look nice and pretty but the snake is getting the same amount of space in a rack with better temperatures, humidity and security.. The snake doesn't care... Trust me.. I tried to do multiple aquariums at first and it only led to humidity issues, temperature issues and security issues with the snake. For example I have a beautiful, crystal spider male and I did everything I could to get his a** is a tank and he wouldn't eat, handled poorly and was constantly stressed out.. Moved him to a rack that had the same floor space and boom.. Ate 4 days later and hasn't stopped.. Remember.. It's what's best for the animal not you..