Can Goldfish (Comet / Common) and White Cloud Mountain Minnow Live Together?
Keeping Goldfish (Comet / Common) and White Cloud Mountain Minnow together is possible but requires caution, though some care is needed. Provide a spacious tank of at least 200 litres with plenty of hiding spots to reduce stress. Monitor behaviour closely, especially during the first few weeks.
At a Glance
Can your tank handle Goldfish (Comet / Common) and White Cloud Mountain Minnow?
Compatibility is only part of the answer. Test both fish with your real tank size, current stock, and maintenance needs to see if you have enough space and a safe stocking level before you add them.
Shared setup supplies
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Behaviour & Temperament
Both Goldfish (Comet / Common) and White Cloud Mountain Minnow are peaceful species with an aggression score of 1/10. Their matching temperaments mean neither fish is likely to dominate the other in a shared aquarium.
Goldfish (Comet / Common) and White Cloud Mountain Minnow both frequent the Top (Surface) and Middle (Open Water) region of the setup. This overlap can increase competition for space, so providing ample room and cover is important to keep both species comfortable.
Worth noting: White Cloud Mountain Minnow is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 14°C and 22°C. Aim for the midpoint of this range (around 18.0°C) for optimal comfort.
Both fish can tolerate a pH between 6.5 and 8. Maintaining a stable value within this band is more important than hitting an exact number.
For general hardness, the shared comfort zone is 5–20 dGH. Regular testing will ensure conditions stay within this range.
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Tank Setup
To house Goldfish (Comet / Common) and White Cloud Mountain Minnow together, plan for an aquarium of at least 200 litres with a minimum length of 120 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.
Because this pairing requires extra vigilance, include plenty of hiding spots — caves, driftwood, and dense plant clusters — so the less dominant fish can retreat when needed.
Specific environmental needs for this combination include: Sand (Sifters), Smooth Gravel (Sensitive Barbels), Plants - Densely covered. Meeting these requirements will help both species thrive.
Note a potential conflict in setup requirements: Goldfish (Comet / Common) is a plant destroyer, which conflicts with White Cloud Mountain Minnow's requirement for live plants. Compromise where possible or prioritise the more critical need.
Both species do well with moderate (standard) water movement, so a standard filtration setup rated for the tank volume should suffice.
Suitable Tank Sizes
Standard aquarium sizes large enough for both Goldfish (Comet / Common) and White Cloud Mountain Minnow.
55 Gallon Standard
60 Gallon Breeder
75 Gallon Standard
90 Gallon Standard
125 Gallon Standard
150 Gallon High
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Frequently Asked Questions
Can Goldfish (Comet / Common) and White Cloud Mountain Minnow live together?
They can coexist, but the pairing requires careful monitoring. Provide ample space (at least 200 litres), plenty of hiding spots, and watch for signs of stress or aggression.
What size tank do Goldfish (Comet / Common) and White Cloud Mountain Minnow need?
A minimum of 200 litres (tank length at least 120 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.
What water temperature is best for Goldfish (Comet / Common) and White Cloud Mountain Minnow together?
Keep the aquarium between 14°C and 22°C. A target of around 18.0°C sits comfortably within both species' preferred ranges.
Are Goldfish (Comet / Common) or White Cloud Mountain Minnow aggressive?
Goldfish (Comet / Common) is peaceful (1/10) and White Cloud Mountain Minnow is peaceful (1/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Goldfish (Comet / Common) and White Cloud Mountain Minnow need?
Both species overlap in the 6.5–8 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
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