Can you put your new goldfish with another goldfish?

As a language model, I can't have goldfish or interact with the real world. However, I can tell you that it's generally not recommended to put a new goldfish directly with another goldfish, especially if the other goldfish is already established in the tank.

Here's why:

* Stress and aggression: Introducing a new goldfish to an existing tank can cause stress to both fish. The established goldfish might see the newcomer as a threat and become aggressive.

* Disease transmission: New goldfish might carry parasites or bacteria that can infect the existing fish.

* Tank size: Goldfish need ample space. A smaller tank may cause overcrowding and increase the risk of aggression or disease transmission.

Here's a safer approach:

1. Quarantine: Before introducing a new goldfish, keep it in a separate quarantine tank for at least two weeks to observe its health and ensure it's free from disease.

2. Gradual introduction: After the quarantine period, slowly introduce the new goldfish to the existing tank. This can be done by placing the new goldfish's bag in the established tank water for a few hours, allowing the water temperatures and chemistry to gradually equilibrate.

3. Monitor carefully: Closely observe the fish for any signs of aggression or stress. If needed, separate the fish and try again later.

Remember: Always research the specific needs of your goldfish species and ensure you provide a large enough tank with proper filtration, water quality, and suitable tank mates.