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Guides

Aquarium water testing, explained

Short, practical guides for freshwater keepers: how to get a reading you can trust, what the numbers mean, and what to do next.

• New tank water parameters: what to test and whenHow the nitrogen cycle works, what to measure, and how to tell when a new tank is ready for fish.
• How to read an aquarium water testStrips and liquid kits: lighting, timing, shaking, and the mistakes behind false readings.
• Ammonia, nitrite and nitrateWhat each reading means, which levels to aim for, and what to do when they are too high.
• How often should you test your aquarium water?A simple schedule for new and established tanks, and when to test straight away.
• How to choose an aquarium appA practical checklist covering test logging, reminders, privacy, cost and data portability.