Coldwater Fish — Complete Guide
Fish that thrive at room temperature without a heater. Coldwater fish are hardy and low-maintenance. They are perfect for unheated tanks and cool rooms.
Species in this group
Our database includes 2 coldwater fish with full care guides, compatibility info, and stocking recommendations.
Quick comparison
| Species | Min tank | Adult size | Temperature | pH | Temperament | Care |
|---|---|---|---|---|---|---|
| White Cloud Mountain Minnow | 10 gal | 1.5" | 60-72°F | 6-8 | Peaceful | Easy |
| Common Goldfish | 40 gal | 10" | 60-74°F | 7-8.4 | Peaceful | Moderate |
Care tips for Coldwater Fish
When keeping coldwater fish, consider these general guidelines:
- Water parameters: Match temperature, pH, and hardness across all species in your tank.
- Group size: Schooling species need groups of 6+ to reduce stress and show natural behavior.
- Diet: Provide a varied diet of quality flakes, pellets, and frozen foods.
- Tank setup: Research each species’ specific needs for decoration, flow, and swimming space.
Frequently asked questions
What are the best Coldwater Fish for aquariums?
Popular coldwater fish for home aquariums include White Cloud Mountain Minnow, Common Goldfish. Each species has unique care requirements — check individual guides for details.
Can different coldwater fish live together?
Most coldwater fish are compatible with each other if water parameters overlap. Use our compatibility checker to compare any two species before adding them together.
What tank size do coldwater fish need?
Tank size depends on the species. Coldwater Fish range from 10 to 40 gallons minimum. Always check individual species requirements.