Here's why:
* Guppies are peaceful community fish. They are generally not aggressive and can be kept with other peaceful species.
* Betta fish are known to be aggressive. They are often called "Siamese fighting fish" for a reason! While they can coexist with some fish, they often attack other males, and sometimes females, too.
Putting a guppy in an aquarium without a betta fish would mean the guppy would have a peaceful environment to thrive in.
However, there are some caveats:
* Individual betta personalities vary. While some bettas are known for being aggressive, others are more peaceful. It's important to research the individual betta's temperament before introducing it to another fish.
* Tank size and decorations matter. A larger tank with plenty of hiding places can help reduce the chance of aggression.
* Proper introduction is essential. Slowly introducing the fish to each other and monitoring their interactions is crucial.
Ultimately, the best decision is to do your research and consider the specific fish involved. It's best to avoid putting a guppy with a betta unless you are very confident in the betta's temperament and you have the proper setup.