It is best to not use salt in a goldfish aquarium unless as a treatment for parasites in the tank of a sick fish. The salt damages nitrobacter bacteria that help keep water quality good and causes the fish to produce a thicker slime coat which stresses out the fish thus making them more susceptible to disease.
No.
No.
fresh water
possibly because brackish is a mixture of fresh and salt water and goldfish cant live in salt water so yeah most likely.
Please don't. goldfish are freshwater fish, not saltwater.
Goldfish don't need salt because they are Freshwater Fish!
I wouldn't think so as goldfish can't live in salt water.
No your goldfish did not "evolve" it "SURVIVED" being put in salt water. You don't say how much salt is/was in the water but placing a goldfish in water to which 1 teaspoon of salt has been added per gallon is a commonly used cure for fungus. Goldfish did not evolve they were selectively bred by Chinese aquarists from a species of wild Asian carp (Carassius gibelio) that had evolved over many millions of years.
yes. they are freshwater fish
Goldfish are freshwater pond fish, fish in the sea live in salt water.
Salt water, water that is too hot or cold or has chemicals in it
No, absolutely not! Brackish water has salt water in it and it will die because of that!