Please choose the correct ending to complete the given sentence: Computers and Electronics: [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.

Ending1: The more space your fish have, the healthier the fish will be. [title] Place your tank in a convenient location with some natural sunlight. Ending2: This is to allow for appropriate oxygen in the tank. [substeps] 7.5 inches x 8 inches (205.8 centimeters) of water is necessary for every 12 goldfish. Ending3: [substeps] Check with your local fish store for the best parts of your tank. Pick a tank that has been given a thorough cleaning before you get started. Ending4: [substeps] Make sure you are making enough room for at least one small goldfish that won't be cramped. [title] Cut the tank to 1 foot (0.6 m).

Answer format: ending1/ending2/ending3/ending4