Coldwater Aquarium

An unheated freshwater aquarium for cold-tolerant species - goldfish, white cloud minnows, hillstream loaches.

Difficulty: Beginner Tank Size: 20g+ Recommended: 40g

📖 Overview

Coldwater tanks operate at room temperature or below - no heater required. Goldfish, particularly fancy varieties like Ryukin and Oranda, are the classic coldwater fish. White cloud mountain minnows, dojo loaches, and hillstream loaches also thrive.

💧 Essential Parameters

Temperature: 60-72 F. pH: 6.8-7.8. GH: 6-15 dGH. Highly oxygenated, well-filtered (goldfish are messy).

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