We will just say 5+ tanks is a fish room. personally I'm not the biggest fan of them, I enjoy having a few tanks but each one has to be well kept and in my opinion display quality. I prefer having 3 tanks that I would not have a problem putting I'm the middle if my living room over having 20 tanks that I keep hidden in one room. I think having a few larger tanks over many smaller tanks is better in my mind. I find fish rooms tend to be messy, and to enclosing. I understand their uses for breeders but they are not for me. I just want to place a couch in front of a few tanks and enjoy. Anyways that's just my thought, what is your opinion?