is it true that if you leave a goldfish alone in the fish tank, it will grow extremely big?

Answer 1

It matters on how large the tank is and how clean the tank is. The goldfish basically won't grow large if you don't have good water quality or a large tank. If you put lots of fish in the tank, the tank will just get overcrowded and the fish won't grow as quickly. If you have a pond, it will work much better, but the maintenance is bad.
Here is a little thing to make your tank clean:

Water quality is usually the main problem when a fish's condition
changes abruptly. The next thing to do is make sure you have the highest water quality possible. This would mean 0 ppm of ammonia, nitrites, and nitrates; all of which you can test using a test kit or by having your local pet store test them for you. Don't add any more fish until you've had your water tested. If any of these levels are too high, you should do an immediate 25% water change. If your levels of ammonia are high, three 25% water changes over the course of a week may help.
In the future, you should perform a 25% water change every two weeks. This will help to control levels of ammonia, nitrites, and nitrates. The water changes will reduce any problems with water quality and help the fish combat parasites plus reduce any harmful bacteria.
In order to maintain low levels of these toxins, you should also make sure not to overfeed your fish or overstock your tank.
Overfeeding of your fish can increase these levels in the water as the uneaten food is allowed to decompose. At each feeding you should feed no more than what your fish can eat in ONE minute, while allowing a minimum amount of food to fall to the gravel. When it comes to feeding fish, less is more.
Overstocking the tank can increase these levels also. As a general rule of thumb you should have one gallon of water per inch of fish when stocking with tropical fish and three gallons of water per one inch of fish water when stocking with goldfish. Excess waste caused by overstocking, like excess food, gives off ammonia and nitrites.
Proper filtration and aeration are other things you may want to
consider. Make sure the filter is working properly and that the water is well oxygenated.

Answer 2

Goldfish release a hormone and if not taken out with regular water changes it stunts the fish. So if you kept a goldfish in a 10 gallon tank but did water changes everyday and the water params were always on spot then it can reach its full grown size, around 8-12 inches. Of course a bigger tank is always better, it gives the fish more room to swim and you wont have to do water changes as often. But it also depends on the food, if you only gave it junk food and not the necessities that it needs then it won't matter what size tank it is in and how often you clean it.

Answer 3

It depends. Goldfish size depends on the following factors:

1. Species. Some will grow up to 12 in., some only up to 3 in. What kind of goldfish do you have? Shubunkin, Koi, Fancy Goldfish etc.?

2. Aquarium size. Fish grows only as much as their environment allows it to. Basic rule is 1 cm of adult fish size per 1 gallon of aquarium water.

3. Fish care. This include clean water, air pump and filter, and regular food supply.

4. Fish tankmates. Your goldfish might be happier with a companion. Just choose a smaller, peaceful variety, e.g., Guppy, Platy, Neon Tetra, Molly, etc. Refrain from adding to your tank any aggressive or semi-aggressive fish, e.g., betta, gourami, paradise fish, angelfish, flowerhorn, etc.

Happy goldfish keeping!

Answer 4

It is not being alone that will allow it to grow, it' the amount of space that he has to swim in. I have seen goldfish that were about 8-10 inches. they were allowed to take over a large swimming pool. It was not being used at the time however. They seemed to grow rather quickly. They were in the pool for approximately 6 to 9 months.

Answer 5

No, not in a tank. And it's true that a fish left in a big pond will grow bigger than one in a tank.
All depends on the size of the pond.

Answer 6

No i had around 9 goldfish in my tank and the smallest grew the biggest and lasted 3 years

Answer 7

It all depends on the space and food you give it. The potential size of a goldfish is like 9-12 inches.. And they can up to 20 years.

Answer 8

From what I've seen, yes, it can. A neighbor had a fish pond that was neglected, and when he cleaned it out, the sole survivor was a huge goldfish. Not quite big enough to fillet and serve with lemon butter, but bigger than any goldfish I'd ever seen before.

Answer 9

Dear Miss Yes they sure do I have a lot of them and I have that is about 2 pounds are so I guess I call him snoopy OK I have a hard plastic shell tank out side on my patio it is really deep it comes up all the way where you bend you arm OK it is really hard to move with water in it OK and it has a filter on it OK to help them breath OK so yes they grow bigger OK

Answer 10

It can grow up to the size set by its genetics assuming it receives adequate food. A goldfish species that grows up to 2 inches will only grow up to 2 inches unless you alter its' genetics.