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)
Depends on the temperature
My dogs favorite treat is goldfish.
Yes. goldfish breathe water so if a goldfish is out of water it cant breathe so it will suffocate
Depending on what your sick goldfish has, it will either be specific to that fish, which you should place in a separate tank to treat, or it's something that will spread to other fish in your tank, in which case you will need to treat them all.
Goldfish are best kept at a temperature of at least 74F to 76F. There are times that you might increase the temperature to a tropical fish level for a short term to treat an illness, but you should not have it too warm.
You can use clean tap water for your goldfish, but not dirty or used water.
Yes, actually it must be in water. If the goldfish is not in water, it will die due to suffocation.
No they do not. The water lice are parasites and will drink the blood of the goldfish.
Don't take a goldfish out of water.
If the goldfish is swimming in water, it is alive.
Feed it different food.And if that doesn't work than that is how your goldfish was born.
What else would you expect them to swim in? Of course Goldfish swim in water.