What other fish can you mix with your comet goldfish besides and koi?

It's great that you're thinking about tank mates for your comet goldfish! While koi are a popular choice, there are other fish that can make great companions. However, it's crucial to be careful about compatibility, considering factors like size, temperament, and water conditions.

Here are some fish that can potentially be mixed with comet goldfish, keeping in mind that proper research and observation are essential:

Similar Temperament & Cold Water Tolerant:

* Goldfish varieties: Other goldfish breeds like fantails, shubunkins, and telescope goldfish can be kept together, but make sure to choose varieties with similar size and activity levels.

* Common carp: These hardy fish are similar in size and temperament to comets and can tolerate similar water conditions.

* Crucian carp: Similar to common carp, these are peaceful fish with good cold water tolerance.

* Rosy barbs: While they prefer slightly warmer water, rosy barbs can adapt to cooler conditions and their lively behavior can be a fun addition to the tank.

Note: Always research the specific needs of each fish before mixing them. Even within the same species, different varieties may have different temperament and size requirements.

Important Considerations:

* Size and growth: Make sure the tank is large enough to accommodate the fully grown size of all fish. Comets can grow quite large, so a spacious tank is essential.

* Temperament: Choose fish with similar temperaments to avoid aggression or bullying. Observe their behavior and be ready to separate individuals if necessary.

* Water parameters: Ensure all fish can tolerate the same water conditions, including temperature, pH, and hardness.

* Diet: Ensure the fish have compatible diets and that all fish have access to food.

* Tank features: Provide plenty of hiding spaces, plants, and flow to create a stimulating environment for all the fish.

Remember: This is just a starting point. Always research the specific needs of each fish and observe their behavior carefully before making any decisions. It's best to consult with an experienced aquarist or local fish store for advice tailored to your specific situation.