20 gal for the first goldie, 10 for every one thereafter... more if you're going to add some other fish, such as a weather loach or some minnows. Plus, get a filter rated for a considerably bigger tank. Goldfish put out a lot of waste, you will need more filtration than you think. Long, low tanks, which have more surface area than tall tanks, are better for goldies.
__________________
Judy
Down to 3 tanks... from 7!!
29g: 3 goldfish (temporary)... thinking of convicts instead
55g: 12 glowlight tetras, 3 yoyo loaches (planning for another school of tetras, some more yoyo's, and maybe a pair of rams... any suggestions?)
2g: 3 guppies waiting for a bigger home and a few more buddies |