yes
If the goldfish is a fancy variety, it can live alone in a 20 gallon tank. Goldfish do not belong in tanks any smaller than this as they grow very large
Well the best thing to do first, when they have outgrown their little tanks, you should get those big tanks with filters. You should get a big one because it would give your goldfish a lot more room to swim.
Goldfish are very cheap and can usually be bought for under $0.50 because they are over bread.
yes
It ranges. They generally grow their whole life. The oldest goldfish lived to be 49 and I believe it was about 3 feet....The house hold goldfish lives between 10-20 (20 means you did great!) years and get about a foot long. They seem small as babies but rapidly grow and need large tanks. Small tanks and bowls stunt their growth and causes many problems besides how big they get. So to answer your question, they get big.
The goldfish tank size myth suggests that goldfish can live in small tanks, but the truth is that they need a lot of space to thrive. Goldfish produce a lot of waste and need room to swim and grow properly. It is recommended to provide at least 20 gallons of water per goldfish to ensure their health and well-being.
No, fish can't hear.
Most likely a Betta if it's freshwater, because they have an organ called the Labyrinth that allows them to thrive in small tanks. You can also have a goldfish, but it won't be very happy.
totally in tanks I've had a fish in a tank and in a bowl and the tank ones lived longer
shouldn't be a problem because they live in both
If theyre different types of goldfish, check theyre suitable to live with each other. If they are, then theyre just fighting over space because the tanks too small. If that's the case, get a bigger one asap. Remember one goldfish needs 10 gallons of water >_< So a couple will need a LOT!!
Yes, the bigger tank the better. They actually HATE goldfish bowls. (they're not nearly big enough). Goldfish usually need a 20 to 30 gallon tank