Is there any way to stop guppies from breeding?

Segregate males from females. This is the most effective way to stop guppies from breeding. Female guppies can store sperm for several months, so it's important to keep them separated from males for at least this long if you want to be sure that they won't reproduce.

- Use a breeding box or net to separate males and females.

- Keep males and females in separate tanks.

Reduce the number of hiding spots. Guppies like to breed in hiding spots, so reducing the number of these will discourage them from reproducing.

- Remove plants from the tank.

- Replace live plants with plastic plants.

- Use a gravel substrate instead of sand or pebbles.

Add salt to the water. Salt can help to inhibit guppy reproduction. However, it's important to use salt in moderation, as too much can harm the fish.

Use chemical contraceptives. There are a number of chemical contraceptives available that can be added to the water to prevent guppies from reproducing. These products typically contain hormones that interfere with the guppies' reproductive cycle.

Consider getting a different type of fish. If you don't want to deal with the hassle of preventing your guppies from reproducing, you may want to consider getting a different type of fish. Many popular aquarium fish, such as tetras, danios, and barbs, do not reproduce as easily as guppies.