I have a decent amount of room indoors. Between the 6 of us in my family though space can be hard to find sometimes. Because of that most of my larger fish systems are in a "shop" on the property. Essentially a garage/workshop/brother's workout room/fishroom/storage room. At the moment I'm not quite sure what I will be upgrading the gators to, either a 11' x 5' x 18", or a 10' x 4' x 2'. Then from there they will keep getting upgraded as needed.