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.
Fish guides for Goldfish, Goldfish care sheets with facts, information and goldfish pictures for all types of goldfish, common goldfish to fancy goldfish, fantail goldfish, commet goldfish, black moor goldfish, bubble eye, oranda, shubunkin, ryukin, telescope eye, celestial goldfish, and more.