curated core
Curated StockingLab core profile.
Planning profile
- Adult size
- ~20 cm / 7.9 in
- Reference tank
- 150+ L / 39.6+ US gal
- Social group
- 2+
- Swim zone
- Mid
- Temperament
- Peaceful
Water window
- Temperature
- 18–24°C / 64.4–75.2°F
- pH
- 7.0–8.4
- Relative waste
- 2.50×
- Activity
- 0.80×
Stocking notes
Heavy-waste cool-water fish; fancy varieties need generous volume and strong filtration.
For planning, StockingLab models Fancy Goldfish at its approximate adult size rather than the juvenile size commonly seen in shops. That matters because space use and waste production can change dramatically as fish mature.
What the calculator checks
- Whether the tank's usable volume is below the 150 L / 39.6 US gal reference minimum.
- Whether the selected group is below the planner's typical 2 fish social starting point.
- Whether target temperature and pH sit inside the planning range.
- Whether prospective tankmates create predation, fin-nipping, territorial or water-overlap conflicts.
- Whether too many fish accumulate in the same mid swim zone.
Before buying
Use this profile as a shortlist tool, not as a substitute for a dedicated care source. Confirm adult size, diet, sex ratio, habitat structure and locally relevant water conditions before purchase.