Hi, so I recently got myself into wanting my very own vivarium. You'll never guess what brought the idea to me in the first place. I decided that it was a great idea, and I should pursue it! So, here is a little rundown on how things will work, and what my intentions are. 20 gallon long Stocking: no living animals Planting: densely, easy beginner plants Design: vertically, high tech Basically, you've got your 20 gallon, right? Alright, so flip that over vertically, and you've got a giant workspace for plants and a neat creation! I decided to do it this way because it makes the most sense, and vivariums are usually tall. The design will be a 20 gallon long tipped over vertically, and kept without any cover to the front panel, except for a six-inch panel to allow some substrate to be added. There will be a background in the tank, I thought of doing spray foam and paint that dark brown, nearly black. I will then cut holes for small plant cups to be placed directly inside with no problems. Here are my very important questions, I need answers to them. 1) Once I spray the foam into the tank, can I remove it after it has dried? I would enjoy painting it outside the tank for easier maneuvering, and less risk of getting paint onto the glass. - 2) Does spray foam stick to glass? What type of foam should I use? - 3) What are some basic plants that do not need outdoor sunlight, and can grow easily underneath a plant light bulb? Remember, no living animals, so there are no boundaries of what glues and paints I can use in the tank. PetCo is having the dollar per gallon sale right now, and it's close to ending, so I want to snag a tank while I still can!