Goldfish to big

[latios]

How do I know if my Goldfish are to big? They are in a 10 galon tank now.

[Mettle]

Sadly, they are likely already too big for the tank.

Typical rule of thumb for most goldfish keepers is 10 gallons per fish. But the more the better.

[plecoL83]

yep, unless they are really really small no go.

[squeeker]

I see from your signature that you have a fantail and a common in your 10 gallon tank.  Technically, the fantail should have 10 gallons and the common 20 gallons as the minimum per fish.  A 30 gallon would do them well, and then they will really start to grow!