The max is 75 degrees but keep the water at 69 because most goldfish like that temperature
the temperature range goldfish need is 68-72 degrees. while some goldfish might be able to survive lower temperatures around the 50s, its not optimum.
Goldfish need water to swim and breath in, not mud. There are some species of fish that have evolved to survive in mud but Goldfish are not one of those species.
It needs the human bodies temperature to survive.
Actually, I think that temperature is about right for your goldfish. But if you seriously need to, you need to change the temperature of the air around the tank. I suggest keeping it in a cooler room?
A swordtail is a tropical fish and a goldfish is not. The swordtail would need a higher temp. than the goldfish. Depending on where you live it probably wouldn't survive the winter.
no
No.
Goldfish will not survive being frozen. They are temperate water fish. Their healthy temperature range is from around 35F to 70F. At the lower temperatures the fish tend to go into a stupor and become more active again at around 50F
Depends on the temperature
yes
Yes, goldfish can survive without food for two days.
No you mook