Yes, use a water conditioner that destroys both chlorine and chloramine, and if you can find one that destroys ammonia too- well that's a bonus.
No, if you put a goldfish in hot water it will die.
FreshwaterI think it's fresh but go to like a pet shop and ask
No, it is a sign of bad water quality and possible ammonia poisoning. Try testing your water and doing a 75% water change if it gets worse.
No, not only are bettas best as a solitary fish, but their needs are different including food and water temperatures.
Sunlight, Water and Soil
Carassius auratus
Goldfishes usually eat tiny bits of vegetables or meat...
goldfish don't have legs
It is from Spring to early Summer.
It can be caused by a disease called pop-eye. It usually happens when you don't have filter. When you don't have filter and you usually clean the water out everyday, your fish can get stress and trauma from all that changing water everyday and stress and trauma causes pop-eye. Or it could be that you have two goldfishes and one of your goldfishes had been playing around with the other goldfish's eye which caused it to fall.
most microbes need light food and water
I've had many freshwater fish and room temperature seems to work. with tropical fish you may need a heater but not with goldfish.