How long should you turn on your air pump in your fish tank for?

It is cruel to keep three goldfish in a tiny 1 gallon tank. Turning on an air pump will only result in the fish suffering for longer before they die. Goldfish grow to around 10 inches long so 1 goldfish needs a minimum of 10 gallons. There are basic rules all successfull fish keepers use. The first is "1 inch of fish needs a minimum of 1 gallon of water" the next is "all water containing aquatic life must have a constantly running cycled filter." and the last of the three main rules but not the least is " All occupied fish tanks need to have at least 50% of their water changed weekly." If you observe and follow those basic rules you will have happy and healthy fish. Failure to keep any one of them will eventually result in problems and dead fish.