I moved out of my parent's place 3 years ago for college and I have been renting rooms (living off campus, been stuck at community college so no dorms). I only have the smaller sized tanks so it's been easy (a 10, 15, and 30g) and I have been just renting rooms that the landlord gives an ok. In fact 2/3 of my places didn't even allow pets, I would ask right before signing the lease if "smaller" fish tanks were ok and both said yes, the first told me to put plastic under in case of a leak and the other just wanted a deposit in case of water damage that gets returned when I move out if there wasn't any. So no issues so far, just had to stick with smaller tanks