What fish can you put in a tank with goldfish?

It's tricky to find fish that are compatible with goldfish because they have specific needs that can clash with other species. Here's a breakdown:

Why it's hard:

* Temperature: Goldfish are coldwater fish, needing temperatures around 68-72°F. Many other species need warmer water.

* Waste: Goldfish produce a lot of waste, and their waste can be toxic to more sensitive fish.

* Fin-nipping: Some goldfish can be aggressive, especially towards fish with long flowing fins.

* Water quality: Goldfish prefer slightly alkaline water, which can be tough for certain fish.

Fish that might work (with caution):

* Other coldwater fish:

* Common Carp: Can tolerate similar conditions but need a large tank.

* Crucian Carp: Similar to common carp, but smaller.

* Comet Goldfish: Can be housed with other comets or fancy goldfish.

* Shubunkin: Similar to comets, but with more vibrant colors.

* White Cloud Mountain Minnows: Small, peaceful, and cold-tolerant, but might be nipped at by larger goldfish.

* Hardy fish:

* Plecos: Algae eaters, but can grow very large. Some species tolerate colder water.

* Corydoras Catfish: Peaceful, bottom-dwelling catfish that help clean the tank.

Fish to avoid:

* Tropical Fish: They need warmer water and can't survive in the goldfish tank.

* Small, delicate fish: These are vulnerable to goldfish nipping and waste.

* Aggressive fish: Goldfish can be territorial, and adding an aggressive fish can lead to fights.

Important Considerations:

* Tank size: Goldfish produce a lot of waste, so they need a large tank (at least 20 gallons per goldfish, with more for larger breeds).

* Aquascaping: Use rocks and plants to create hiding places for fish and reduce aggression.

* Observation: Monitor your fish closely for signs of stress or illness.

Always do thorough research before adding any fish to a tank with goldfish. Consider the size, temperament, and specific needs of each species to ensure a peaceful and healthy environment.