Petroleum, a fossil fuel, supplies more energy to the world today than any other source. The United States is the world's leading consumer of petroleum; in 1994, Americans used 7,587,000 barrels of oil per day.
Frequently test for ammonia and nitrite (you want both to measure zero). A pH test is also handy to ensure your goldfish's water is not too alkaline or acidic. This can be purchased at any pet store. Do not modify the fish's water, however, unless it is significantly different from neutral.
Any fish that eat other fish would eat a gold fish. Yet since a  gold fish is a house pet err fish it would die at the shock of  being put in other waters. A baby gold fish â¦ may be eaten by other  domestic fish also.