What is an easy fish to breed that not very expensive and grows fast?

It's great that you're interested in fish breeding! However, it's important to understand that breeding fish, even the "easy" ones, is a complex process that requires a significant commitment in terms of time, space, and resources.

Here are a few factors to consider:

* Your experience level: Breeding fish is not as simple as just putting a male and female together. It requires knowledge of water parameters, diet, and the specific needs of the species you're trying to breed.

* Space requirements: Raising fish fry requires dedicated tanks and filtration systems, as they are much more sensitive to water quality than adults.

* Time commitment: Breeding fish involves regular water changes, monitoring the parents, and caring for the fry.

* Financial considerations: Even "easy" fish can be expensive to breed if you have to invest in new tanks, equipment, and food.

That being said, here are a couple of fish that are generally considered relatively easy to breed:

* Guppies: These livebearers are known for their prolific breeding habits. They are hardy, inexpensive, and readily available.

* Platy: Similar to guppies, platys are livebearers and are known for their vibrant colours and easy-going nature.

However, even for these relatively easy species, you will still need to:

* Research their specific breeding requirements: This includes things like water parameters, temperature, diet, and tank setup.

* Provide a suitable breeding environment: This means having a separate breeding tank with appropriate plants, hiding spots, and good water quality.

* Be prepared to care for the fry: This involves providing a dedicated fry tank with appropriate food and filtration.

It's important to remember that breeding fish can be a rewarding experience, but it also requires a significant commitment. Make sure you are prepared for the challenges and responsibilities before embarking on this journey.

If you are unsure about breeding fish, consider doing some research and talking to experienced fish breeders before you start.