Goldfish
Domesticated in China from wild carp
- Temperament
- Peaceful
- Diet
- Omnivore
- pH
- 7–8
- Group
- 2+
- Typical price
- $2–30
Demo
Goldfish in a nano
River Keep demo · Nano, 5–10 gal · calm, like a pond or swamp · running 342 days · shared October 2026
Goldfish grow to 20 cm or more and make a lot of waste. A nano tank is a short-term home at best.
The fish
× 2
Already too big for this tank.
Report
- Shared range 10–24°C
Every species is comfortable in this range.
- Goldfish outgrows this tank
It reaches about 20 cm. A rough rule is a tank at least 4 times the fish’s length, so 80 cm or more.
- Overstocked (480%)
Too much waste for the water. Remove fish, pick a bigger tank, or plan on heavy filtration and large water changes.
- Tank size is a guess
Size and stocking checks use a typical tank of the size you picked. Add the real length and volume for a sharper answer.
- Some values are estimates
Care data for Goldfish is estimated or taken from the genus, not yet checked against a source.