Changes

An '''aquarium''' is a [[glass]]- or [[plastic]]-sided tank used to house and display live [[fish]] or other [[aquatic]] animals and plants. The aquarium size/capacity is usually measured in gallons of water, such as a 20 gallon tank or 40 gallon tank. A saltwater tank is required for fish from the [[ocean]]; a freshwater tank is used for [[tropical]] fish and [[goldfish]].

An '''aquarium''' is a [[glass]]- or [[plastic]]-sided tank used to house and display live [[fish]] or other [[aquatic]] animals and plants. The aquarium size/capacity is usually measured in gallons of water, such as a 20-gallon tank or 40 gallon tank. A saltwater tank is required for fish from the [[ocean]]; a freshwater tank is used for [[tropical]] fish and [[goldfish]].

An aquarium for tropical fish would typically include the fish, water, a filtering device and an aerating device to keep the water filtered and oxygenated, a heater, an overhead light, small rocks, [[gravel]], or [[sand]] on the bottom of the tank, an assortment of plants, and possibly other decorations. An aquarium for small [[turtle]]s would include an underwater area and an above ground area such as a rock.  

An aquarium for tropical fish would typically include the fish, water, a filtering device and an aerating device to keep the water filtered and oxygenated, a heater, an overhead light, small rocks, [[gravel]], or [[sand]] on the bottom of the tank, an assortment of plants, and possibly other decorations. An aquarium for small [[turtle]]s would include an underwater area and an above ground area such as a rock.