It depends on the fish. If its a tropical fish that is accustomed to salt water, you need salt water and you need to keep the water at a warmer than norm temperature. If its just a regular goldfish, freshwater at room temp should do just fine.
Fish comes top of the water to get oxygen.
Yes. goldfish breathe water so if a goldfish is out of water it cant breathe so it will suffocate
change water
Goldfish can settle at any level in the water to rest/relax although they often do go to the bottom.
Go to the plaza then go to the goldfish zone then there is four places you could go through in the goldfish zone
goldfish don't really need treated water because goldfish are like feeder fish there is a 20% chance there going to live past a month but if you want to try it just go to petsmart and get betta water conditioner or leave regular tap water out for a couple days (2-3)
Yes, actually it must be in water. If the goldfish is not in water, it will die due to suffocation.
You can use clean tap water for your goldfish, but not dirty or used water.
No they do not. The water lice are parasites and will drink the blood of the goldfish.
Goldfish do eat water lettuce as part of their diet.
Don't take a goldfish out of water.
If the goldfish is swimming in water, it is alive.