It can't be done. Goldies get huge unless they are the facy kind. Try a pond or get five in a thirty gallon.
One goldfish needs a 30-gallon tank, and an additional ten-gallons per additional goldfish. Goldfish can grow to be 10-12-inches long.
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
7....But you should keep an good watch on them.
Yes, but your tank size needs to support it. If you mean that a regular goldfish is a long single-tail goldfish, then you need at least a 40 gallon tank just for the 2 fish due to the size potential of the common goldfish. If you mean a regular goldfish as in a round bodied fantail, or perhaps a ryukin, then you need at least a 30 gallon tank for the 2 fish.
Goldfish release growth-inhibiting hormones into the water they live in: the more goldfish in a smaller space, the less likely they are to grow. For instance, if I have a common goldfish in a 5 gallon tank, it will grow to about the same size if I had 6 of the same fish in a 30 gallon tank. But leave that fish alone in a 30 gallon tank, and it will grow larger. This is why pond goldfish grow bigger. But goldfish won't grow at all in seawater; they aren't saltwater fish.
For twenty small (1-1.5 inch) Goldfish you should have something like a 30 gallon aquarium.
30. You just said it's a 30 gallon tank.
You cant. Goldfish need much bigger tanks. 20-30 gallons. I bought 2 goldfish when I was new to aquarium hobby and put them in a 5 Gallon tank. The first one died in just one and a half day. The other one died just hours after the first one :( So if I were you, I would get a bigger tank.
I have a 10gallon with a common and a shubunkin goldfish. They are both around 2.5 inches. I am soon upgrading to a 30 gallon so there will be enough room when they get bigger.
you would have to get a 10 gallon tank for 1 goldfish! you would need a 20 gallon tank for 2 goldfish. Also goldfish don't go well together there just being stored at the store they take the fish out right when they start to be aggressive. sorry bout your 2 gallon tank!!
one goldfish have a high ammonia output and they will keep growing if you have a 2.5 gallon tank i would suggest a male beta they are pretty and bred for small tanks
Goldfish grow extremely large; fancies will become fatter, and singletails grow quite long. You should only have 2 fancies in a 30 gallon, or one singletail for proper health and growth.