goldfish keeping _before_ electricity ??

I am curious ... goldfish have been bred and kept for centuries ...
while most current filtering technologies use electricity ... how did
the Chinese keep healthy goldfish before electricity? Any ideas? I am
interested to see what I/we might learn from the traditional aquarist
methods.

Any references to books/sites, et cetera, would be most appreciated.

BTW, I am familiar with Mike Edwardes' Lotech Tank experience.

Thanks,
Dennis

>how did
>the Chinese keep healthy goldfish before electricity? Any ideas? I am
>
> interested to see what I/we might learn from the traditional aquarist
>
>methods.

Go to the site green&gold.