Can a goldfish be in tank with another goldfish?

Goldfish are generally social fish and can live happily with other goldfish. However, there are a few things to keep in mind when keeping multiple goldfish together:

1. Tank Size: Goldfish need a lot of space to swim and grow. The minimum tank size for two goldfish is 20 gallons, and an additional 10 gallons should be added for each additional goldfish.

2. Water Quality: Goldfish produce a lot of waste, so it is important to keep the water in their tank clean and well-filtered. A good filtration system and regular water changes will help to ensure the health of your goldfish.

3. Compatibility: Some goldfish varieties can be more aggressive than others, so it is important to do some research before choosing tankmates for your goldfish. Some good choices for tankmates include other goldfish, white cloud minnows, zebra danios, and platies.

4. Health: Goldfish are prone to a variety of diseases, so it is important to keep an eye on their health and quarantine any new fish before adding them to the main tank.

By following these tips, you can help to ensure the health and happiness of your goldfish.