The Comet Goldfish is the most popular and commonly kept goldfish in the world. When small, the comet goldfish is great for keeping in an indoor aquarium. Long term, comet goldfish have the potential to grow quite large and are ideal for outdoor garden ponds. Comet goldfish are friendly and very active, and thrive in coldwater community aquaria.
How big do Comet Goldfish get?
Comet goldfish can grow to exceed 12 inches or 30cm as adults. You will need adequate space in your aquarium or pond to accomodate this growth. One fish per 25 litres is a good stocking guideline.
Can you keep Comet Goldfish with Koi?
Yes, you can quite happily keep comet goldfish with Koi, as well as other coldwater species such as goldfish and sturgeon. You can also keep with fancy goldfish indoors, although they may out-compete slower swimming species for food.
Approx. supplied size: 2-3" / 5-7cm
Maximum size: 12" / 30cm+
Lighting requirement: Low
Ideal number kept together: 1+
Our conditions: pH 7.5, temp 18°C
Ideal pH: 6.5–8.0
Water flow: low to moderate
Ideal temperature: 2-30°C
Ease of care
Easy. Goldfish will drop to the bottom of your pond during winter to keep warm, so try to ensure that your pond is at least a foot deep.
Comet goldfish are compatible with virtually all coldwater community fish. Take care not to house with very small fish once fully grown, as they tend to eat whatever fits in their mouth.
Omnivorous. Feed goldfish flake or pellets.
Egg layers. Proflific spawners, will breed easily in an outdoor pond.
Comet goldfish can live up to 10+ years in perfect conditions.
For more information on general fishkeeping and our shipping procedures click here.
Pre-orders are shipped once we have the stock available and will be shipped using the service chosen at checkout.
All services are working day services and do not include delivery on Saturdays and Sundays or public holidays as standard. Deliveries are usually Monday to Friday only, although some Royal Mail items may be delivered on weekends as standard if the service is available in your area.
|Royal Mail (2-3 days)||£0.00-£49.99||£2.99|
|Royal Mail Next Day (1-2 days)||£0.00-£49.99||£4.99|
|Parcelforce 24 (1 day)||£0.00-£49.99||£7.99|
|Parcelforce 24 (1 day)||£50 and up||FREE|
|Pallets (booked in)||aquariums / bulky items|
Pallets Standard (3-5 days)
Pallets Express (1-2 days)
|*EXCLUDED ITEMS||extra delivery fees apply:|
|Fibreglass Ponds (booked in)|
Zone 1 (7-10 days)
|Zone 2 (7-14 days)||-||£149.99|
|Zone 3 (7-21 days)||-||£249.99|
|Pond Plants (direct from grower)
|All pond plants (3-10 days)||one-off fee regardless of order size/value||£5.99|
Please see our full delivery information page and terms and conditions for detailed information on shipping policies and zones