Help with breeding fish?

Question

how big should the tank be if I'm breeding 1 female with 3 male?(female is 4 inches, and the rest is 3 inches) is 20 gallon big enough? they are comet fish and also can the female absorb its eggs if it doesn't like the tank its in or if its too small?

Answer 1

Comet fish - you mean comet goldfish?

If they fit in a 20 gallon they're too young to breed.

These fish need a large pond (500 gallons minimum) in which to successfully breed, and to be at least 2 years old nearing full grown (over 6"-8" at least).

To breed them in a tank you'd need at least a 75-100 gallon.

Also, unless the comets are show quality, breeding them is effectively pointless as thousands die unwanted in petstores as it is.