Best fish lists
Best Coldwater Fish for Unheated Aquariums
Last updated: May 2026
Define roughly 10–20 °C comfort bands honestly—avoid tropical shortcuts.
- Goldfish — volume sacred
- White clouds via coldwater beginner article
- Weather / stone loach references for readers researching
Browser calculator stays free. The app only matters if you want several tanks, photos, and test history on your phone.
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