What are the cheapest, easiest fish to breed?

Getting cardinals to breed may be quite easy. but raising the young is where the challenge would lie. I do plan to get a breeding pair of them in my tank, but dont expect to attempt in raising the fry for quite some time.

 

You want to get bangais if you get cardinals, pajamas are harder to raise.

Guppies are by far the easiest to breed, probably to easy. get a male and female and in 4 months you will have hundreds. keep in mind the more you have in the tank the more babies will be born. Guppies could probably take over the earth with no predators.

 

+1 guppies are definatley easy!

I have bred clowns and bangaiis, all pretty much the same, you just have to learn to care for the fry... thats the tough part.