Fantail Goldfish (Care Guide)

colorful ornamental fish species

The Fantail Goldfish is known for its double tail fins and rounded shape. These fish are popular in aquariums for their beauty and movement. However, they require careful attention to their diet and living conditions.

Proper care is important for their health and can help them live over ten years. It’s essential to understand the needs of Fantail Goldfish to keep them healthy in an aquarium setting.

General Characteristics

The Fantail goldfish is recognized for its double tail and short, stout body. This breed can live for 10 to 15 years with appropriate care.

Fantail goldfish generally grow to about 7 inches, fitting well in different aquarium sizes.


Fantail goldfish have an egg-shaped body and two tail fins. Their tails have a fan shape, and they have a short body. They often have a tall dorsal fin.

Fantail goldfish can be orange, white, red, or multicolored, and sometimes have metallic or shiny scales. Their fins are smaller than those of Ryukin goldfish, but having even coloration that includes the fins is preferred for show goldfish.


Fantail goldfish can live 10 to 15 years with proper care and environment. Their longevity depends on careful maintenance of tank size and water quality.

Keeping water clean reduces health issues, like swim bladder disease. It’s important to monitor water for ammonia and nitrate levels, keeping them low to prevent disease and ensure fish health.

A balanced diet is also crucial. Goldfish from good breeders may be healthier and live longer, highlighting the value of responsible breeding.


Fantail goldfish typically grow to 6-8 inches, larger than common goldfish, and need sufficient space. Their round bodies and double tails contribute to their size.

They require a large tank with good filtration and a nutritious diet for proper growth. Regular water testing is vital for their health.

Fantail goldfish can live 10-15 years with proper care.

Aquarium Setup Essentials

To create a suitable environment for fantail goldfish, a tank of at least 20 gallons is necessary. The water conditions should be optimal, and the aquarium should contain decorations that promote the fish’s well-being and natural behavior.

Choosing compatible fish for cohabitation and performing regular maintenance are essential for a healthy aquarium.

Tank Size

A 20-gallon tank is required for Fantail goldfish to allow enough room for movement and a strong filtration system.

Proper filtration is essential to manage the high waste output of these fish and maintain water quality. The tank should have a filtration system adequate for the fish’s bioload.

Regular tank maintenance, including partial water changes, is necessary for a healthy environment. Overcrowding must be avoided, suitable tank mates chosen carefully, and the habitat enriched with appropriate decor and plants to prevent stress and health issues in the goldfish.

Tank Equipment And Decorations

To maintain the well-being of fantail goldfish, it is important to have the right tank setup and decorations.

Aquarium Essentials

  • At least a 30-gallon tank is required for sufficient space.
  • A filtration system is necessary to keep the water clean.
  • A heater is needed to keep the water temperature between 65°F to 80°F.

Decorations and Substrate

  • Use soft sand as a substrate to avoid injuries.
  • Choose decorations with no sharp edges to ensure safety.
  • Include plants and driftwood to enrich the habitat naturally.

Water Quality and Maintenance

  • Employ water test kits to check pH levels (6.0 to 8.0) and hardness (4 to 20 dKH).
  • Perform regular water changes to maintain optimal water quality.
  • Feed sparingly and only with quality live or frozen food to prevent overfeeding.

The right tank equipment and decorations are crucial for a safe and engaging environment for fantail goldfish.

Care Guidelines

Proper care for fantail goldfish is essential for their well-being and long life.

This includes providing a balanced diet, maintaining water quality, and regular tank cleaning.

Knowing about common diseases also helps keep the goldfish healthy.


A balanced diet is essential for fantail goldfish health. Their diet should include high-quality fish flakes and pellets as the primary food source, providing necessary nutrients. Additionally, include fresh vegetables like lettuce and spinach to aid digestion. Offer live or frozen foods such as brine shrimp and bloodworms occasionally, but do so in moderation to prevent overfeeding.

Overfeeding can lead to water pollution and health problems for the fish. Monitor the fish’s eating habits and adjust food amounts so they can consume everything within a few minutes, reducing waste and digestive issues.

Water Parameters

Maintaining proper water parameters is essential for Fantail goldfish health. The water temperature should range from 65°F to 80°F. Gradually increase the temperature if it falls too low to avoid shocking the fish. The pH level should be stable between 6.0 and 8.0, and water hardness should be between 4 and 20 dKH. An imbalance can cause stress and illnesses such as fin rot. Regular tests and water changes are important for maintaining these parameters.

ParameterIdeal RangeImportance
Temperature65°F to 80°FAvoids shock, reduces disease risk
pH Level6.0 to 8.0Essential for gill and overall health
Water Hardness4 to 20 dKHImportant for bodily functions

Tank Maintenance

Regular monitoring and adjusting of water parameters is crucial for tank maintenance and the health of Fantail goldfish. It’s important to keep the water temperature stable as fluctuations can stress the fish. Conduct daily temperature checks to maintain stability.

The tank environment should mimic their natural habitat and remain clean and balanced. Carry out partial water changes of 10-20% weekly instead of full replacements to prevent stress from sudden shifts.

Remove waste and excess food daily to avoid the accumulation of harmful ammonia and nitrites, ensuring the well-being of the goldfish and a balanced aquatic ecosystem.

Common Diseases

For Fantail goldfish enthusiasts, it’s essential to guard against illnesses like ich, bacterial infections, and swim bladder disease to maintain the fish’s well-being and lifespan.

Maintain a healthy habitat for Fantails by doing the following:

  • Consistently test water for temperature, pH, and hardness.
  • Feed a nutritious diet without excess to prevent tank contamination.
  • Promptly remove uneaten food to inhibit fungal and bacterial development.

Breeding requires:

  • Ensuring sterile conditions to protect against disease and promote fry health.
  • Keeping fry food clean and preventing adults from consuming the eggs.

Disease prevention methods include:

  • Watching for early disease symptoms in Fantails.
  • Isolating new or ill fish to stop disease spread.
  • Regularly changing water and cleaning the tank.

Personality Traits

Fantail goldfish are calm and suitable for community tanks with other peaceful fish. They are not shoaling fish but enjoy the company of other non-aggressive fish, swimming in loose groups. Their gentle nature is compatible with both beginner and experienced fish keepers.

Bred for their fan-shaped tails, Fantail goldfish are adapted to captivity and have friendly personalities. They are often chosen by buyers for their soothing effect and graceful swimming.

For breeding, Fantail goldfish need stable conditions in a separate tank with fine-leaf plants or spawning mops for egg laying. They are best paired with other fancy goldfish to prevent stress from more active swimmers.

Compatible Tank Companions for Fantail Goldfish

Fantail goldfish are compatible with other fancy goldfish types, which share similar swimming speeds and care needs. It is important not to pair them with more aggressive or faster-swimming goldfish like Comet or Shubunkin to avoid stress and competition.

Zebrafish, also known as Zebra Danio, are peaceful tropical fish that can live in cooler waters, making them good tank mates for Fantails. The tank should be spacious and the temperature should be suitable for both species.

Feeding should be managed to prevent overfeeding and ensure all fish, including slower eaters, get enough food. A varied diet of flakes, pellets, and live food should be provided, with careful monitoring during feeding times.

Tank size and environment must accommodate the growth of species like the Prussian carp, which can grow large. The tank must have ample space and clean, filtered water to ensure a healthy habitat for both Fantail goldfish and their tank mates.

Reproductive Behavior and Techniques

Fantail goldfish breeding requires a specific environment and careful attention to ensure successful spawning and fry development. A separate breeding tank with fine-leaf plants or spawning mops is needed to create the right conditions. These provide surfaces for the eggs to stick to. It is important to choose breeding pairs that are healthy and have desirable features, like a well-shaped tail fin.

Maintaining a clean breeding space with proper water quality, temperature, and a good diet is important for a successful spawn. Fantail goldfish are capable of laying thousands of eggs in one breeding season. The eggs must be protected from the adult fish, which might eat them.

Once the eggs hatch, the fry should be carefully looked after. They start by feeding on their yolk sacs and then move on to infusoria and baby brine shrimp. Selective breeding is used to ensure only the best fry are raised. This is key to keeping the breed’s quality and ensuring future generations have the traits that are valued.

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