One wife, one Boxer dog named Otto Mattick*, two pre teen kids, two parakeets, three tanks. Tanks... 110G Oscar named Darwin** and dithers ,57G mix tropicals for the kids and wife, 20G with a batch of convict fry and their dad and a 3 tier Koi and gold fish pond in the back yard with 30+ fish. (they are hard to count)
The 110, 57 and Koi/goldfish pond is designed with automatic water replenishment and exchange. Whole house has power backup.
The Koi pond setup is a real joy in our house. It has been running for 6 years, is largely trouble free and can go for 2 weeks unattended if need be. Fish and plants all settled in and working well and the ponds look great and all natural with well established moss, ferns, flowering plants and surroundings.
*Best dog I have ever owned and I have had a bunch.
** House rule is "Never ever name a fish" But an Oscar is not just a fish now is it? .