Goldfish are one of the world's most recognisable freshwater fish, prized for their beautiful colours, graceful swimming and friendly personalities. From elegant Fancy Goldfish to active Single-Tail varieties, these intelligent fish can live for many years when provided with the right environment, making them rewarding companions for aquarists of all experience levels.

Why You'll Love Goldfish

• Beautiful colours, patterns and body shapes
• Friendly, interactive fish that quickly recognise their owners
• Long-lived pets when cared for correctly
• Available in both Fancy and Single-Tail varieties
• Ideal for large aquariums and suitable outdoor ponds

Creating the Ideal Home

Tank Size

Goldfish require significantly more space than many people realise. Fancy Goldfish should be kept in aquariums of at least 120 litres for a pair, while Single-Tail varieties such as Common, Comet and Shubunkin Goldfish are best suited to very large aquariums or outdoor ponds due to their size and activity level.

Temperature

Goldfish are cool-water fish and generally thrive between 18–24°C. While they can tolerate lower temperatures, sudden fluctuations should always be avoided.

Water Quality

• Ammonia: 0 ppm
• Nitrite: 0 ppm
• Nitrate: ideally below 40 ppm
• pH: 7.0–8.0

Goldfish produce a large amount of waste, making excellent filtration and regular water changes essential for maintaining healthy water quality.

Filtration

Oversized filtration is strongly recommended. Choose a filter capable of handling the high biological load produced by goldfish while maintaining excellent water circulation and oxygenation.

Aquascaping

Goldfish appreciate open swimming areas with smooth decorations that won't damage their fins. Hardy live plants such as Anubias and Java Fern can be used, although some goldfish may nibble on softer plant species.

Feeding

Goldfish are omnivores and benefit from a varied diet designed specifically for their digestive system.

• High-quality goldfish pellets
• Sinking foods for Fancy Goldfish
• Blanched spinach, zucchini and peas
• Frozen bloodworms
• Brine shrimp
• Daphnia

Feed small portions two to three times daily and avoid overfeeding, as poor water quality is one of the biggest causes of health issues in goldfish aquariums.

Suitable Tank Mates

Goldfish are best kept with other goldfish of similar swimming ability and size.

• Other Fancy Goldfish
• Other Single-Tail Goldfish (for ponds and large aquariums)
• White Cloud Mountain Minnows (larger aquariums)
• Weather Loaches (cool-water setups)

Avoid keeping goldfish with tropical fish, fin-nipping species or small fish that may become food as the goldfish grows.

Popular Goldfish Varieties

• Oranda Goldfish
• Ranchu Goldfish
• Ryukin Goldfish
• Pearlscale Goldfish
• Fantail Goldfish
• Black Moor Goldfish
• Comet Goldfish
• Shubunkin Goldfish
• Common Goldfish

Goldfish FAQs

Can Goldfish live in bowls?

No. Goldfish require proper filtration, stable water quality and plenty of swimming space. A bowl cannot provide the environment needed for long-term health and should not be used as permanent housing.

Do Goldfish need a heater?

In most Australian homes, goldfish do not require a heater. However, they do need stable temperatures, so avoid placing aquariums where temperatures fluctuate rapidly.

How long do Goldfish live?

With proper care, many goldfish live 10–20 years or longer. Some have even exceeded 30 years in exceptional conditions.

Can Goldfish live with tropical fish?

Generally no. Goldfish have different temperature requirements and dietary needs, making species-only aquariums or cool-water community tanks the better option.

Why are my Goldfish always hungry?

Goldfish are opportunistic feeders and often appear hungry even after eating. Stick to a regular feeding schedule and avoid overfeeding to maintain good water quality.