There's loads of general rules. So far, I've heard:20g minimum for one goldfish. 10 gallons for each additional fish. Never heard the general rule being 20 gallon per goldfish.
Yeah, that's true. It's just that I hear enough goldfish breeders suggest that one. It's pretty reasonable I think. I guess I can make up my own general rule. Maybe it'll catch on. Nah, I like the first one well enough.There's loads of general rules. So far, I've heard:
- 20 gallon for one, 10 for the rest
- 20 gallon each
- 15 gallon each
- 30 gallon for one, 10 for rest
And that's to name a few, there's of course variations of that. Not to mention surface area, and then dividing that - something that people on this forum definitely doesn't do!