Just a very little bit cooler than room temp
No, if you put a goldfish in hot water it will die.
Salt water, water that is too hot or cold or has chemicals in it
cold is better cuz when your in the ocean is the water hot or cold cold
Yes. goldfish breathe water so if a goldfish is out of water it cant breathe so it will suffocate
yes, but dont use a big one that makes the water too hot
No, but if the water gets too cold you might suggest heating it up, but not too hot because most goldfish don't liike hot water.
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.