How often should you do water changes on your aquarium? We made a high-level water change flow chart for fish keepers who need help figuring out their tank maintenance frequency, and the internet had some divided opinions. Cory explains more in-depth how water change schedules depend on many factors: the fish and plant stocking levels, your tap water's parameters, tank size, primary goals for the aquarium, time and energy limitations, etc. #AquariumCoop | Aquarium Co-Op