A gold-fish tank would need to be big enough for it to swim about and do whats-ever it wishe's to! because before my brother had fish and in the tank he had a big massive fish nd then 2 wee gold-fish and the big fella was taking up all the space so we had to separate them!
yes
yes
No, fish can't hear.
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
A goldfish is a type of fish.
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.
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
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
yes. they can get many diseases from bacteria in tanks and other sick fish.
Tanks that are reffered to as "breeder tanks" work very nice as a goldfish aquarium. They are quite wide and noticeably shorter than the average tank which is more of a rectangle and doesn't permit as much gas exchange. An aquarium that is wider has a larger surface area thus allowing more gas exchange resulting in higher dissolved oxygen levels.
Probably, but usually the comet goldfish will get all the food and/or the other goldfish will become miserable. This has happened to me before and I do not recommend putting them in the same tanks. Try putting the fancy and comet godlfish seperate!