How often does one goldfish in bowel need fresh water?

Answer 1

Goldfish should never be kept in a bowl. It is cruel. Back in the days of ignorance like 200 years ago, people did not know what a fish needs in order to live, and so one can excuse them for doing the wrong thing. In this day and age of knowledge, there is no excuse for keeping a fish under those cruel conditions. You really must follow the basic rules of sucessfull fishkeeping if you want to keep fish succesfully. The basic rules are . :- 1 inch of fish must have at least 1 gallon of water. (a goldfish is a 10 inch fish so needs at least 10 gallons of water.):- Every tank must have a permanently running 'cycled' filter. :- Every tank must have at least 50% of its water replaced every week.