[header] How to set up a healthy goldfish aquarium [title] Get the right size tank for the size and number of goldfish. [step] Goldfish require more space because they produce a lot of waste during digestion. Provide at least 24 square inches (154.8 square centimeters) of water for every 1 inch (2.5 cm) of fish. 
The more space your fish have, the healthier the fish will be. [title] Place your tank in a convenient location with some natural sunlight.