This linguistic confusion is why Americans call the Pennsylvania Dutch Dutch even though they're Germans. To review: this country is the Netherlands, its people are Dutch, they speak Dutch. There is no country called Holland, but there are provinces of North and South Holland.
In clean, uncrowded conditions in tanks or ponds, goldfish grow fast. They can grow to a few inches (1 to 4 inches) within the first year. It really depends on their genetics and living situation. It may take a year or two before they change color from brown to gold or whatever color their parents were.
Buying a goldfish tank that is large enough and designed to house the number of goldfish you plan to keep is the first step to raising healthy fish that thrive.The type of aquarium you choose can determine whether your goldfish flourish or just barely survive.You want a goldfish tank that your fish can comfortably live in. Goldfish can live for 15 to 20 years, and some have even surpassed the 20-year mark.uying a goldfish tank that is large enough and designed to house the number of goldfish you plan to keep is the first step to raising healthy fish that thrive.