COMET GOLDFISH (Carassis Auratus) LRG 5-6 Inches
$30.00
Full Description
Here is a complete care guide for the Comet Goldfish (Carassius auratus), one of the most popular and hardy goldfish varieties. They are ideal for both indoor aquariums and outdoor ponds.
COMET GOLDFISH CARE GUIDE
Quick Overview
| Feature | Details |
|---|---|
| Scientific Name | Carassius auratus |
| Common Name | Comet Goldfish |
| Type | Single-tailed, streamlined goldfish |
| Adult Size | 10–12 in (25–30 cm), up to 14″+ in ponds |
| Lifespan | 10–20 years (sometimes longer!) |
| Temperament | Peaceful, social, very active |
| Skill Level | Beginner-friendly (with proper care) |
TANK OR POND SETUP
Minimum Tank Size
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Aquarium: At least 30 gallons for one Comet
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Add 15–20 gallons per additional fish
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Ponds are ideal due to their active nature and large adult size
Water Parameters
| Parameter | Ideal Range |
|---|---|
| Temperature | 65–75°F (18–24°C) |
| pH | 6.5–8.0 |
| Ammonia/Nitrite | 0 ppm |
| Nitrate | < 40 ppm |
| Hardness | Moderate (100–250 ppm) |
❄️ Comets are coldwater fish but can handle room temps. A heater is not required unless your home gets very cold.
Filtration & Aeration
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Strong filtration is crucial — goldfish produce a lot of waste.
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Use a hang-on-back (HOB) or canister filter with biological media.
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Add an air stone or bubbler to ensure oxygen levels stay high.
Substrate & Décor
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Use smooth gravel or sand to prevent injury.
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Keep decorations smooth and safe — goldfish can get injured easily.
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Floating plants and tough live plants like Anubias, Hornwort, and Java Fern can work if not eaten.
️ FEEDING
Diet: Omnivore
Goldfish need a varied diet for health and color.
| Food Type | Examples |
|---|---|
| Staple | Goldfish pellets or flakes |
| Veggies | Blanched peas (shelled), spinach, zucchini |
| Protein treats | Bloodworms, brine shrimp, daphnia (occasional) |
| Algae wafers | Optional for extra greens |
Feed small amounts 2x per day — only what they can eat in under 2 minutes. Avoid overfeeding.
TANKMATES
| Compatible | Avoid |
|---|---|
| Other Comet or Common Goldfish | Fancy goldfish (too slow) |
| White Cloud Mountain Minnows | Tropical fish (different needs) |
| Rosy Barbs (coolwater only) | Aggressive or nippy species |
Comets are fast and competitive eaters — they may outcompete slower fish for food.
MAINTENANCE
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Water changes: 25–50% weekly
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Vacuum substrate regularly
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Test water parameters weekly with a liquid test kit
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Rinse filter media in tank water, not tap
BREEDING
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Comets are egg-layers
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Males chase females to spawn
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Eggs are sticky and laid on plants or decor
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Remove eggs to avoid being eaten, or use a breeding net or spawning mop
✅ KEY TIPS FOR SUCCESS
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Never use a bowl — it’s inhumane and unhealthy
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Use dechlorinated water always
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Test water weekly for ammonia, nitrite, nitrate, and pH
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Provide plenty of swimming space
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Avoid mixing with slow, fancy goldfish
SUMMARY
Comet Goldfish are fast-growing, long-lived, and highly active fish that thrive in large, clean tanks or outdoor ponds. With proper care, they can become friendly, interactive pets that live over 15 years.
4 in stock