I used to have a couple aquariums in the house. I miss having them, as they were very relaxing to watch, but don't miss the cleaning. Had 20gal lows, 37 gal and a 55 gal. The 55 had my African cichlids, but when I started dating my wife, her and her daughter stayed over one night. Her 9yo daughter thought the fish were cold, so she turned up the heater and cooked the fish! Also had an albino channel cat that outgrew the 37 gal. He got just over a foot long before I sold him to an aquarium store. By far, my favorite was my red Oscar. Grew to be pretty old and good sized since I was always feeding him live food like goldfish and small frogs I found outside. I keep thinking about getting back into aquariums, but the maintenance part keeps me from doing it.