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Your first aquarium: a step-by-step setup guide

Beginners · 31 Oct 2026

Everything you need to know from choosing a tank to adding your first fish.

1. Choose the right size

Bigger tanks are more stable. For beginners, 60–90 litres (2–3 feet) is ideal.

2. Place it well

Keep the tank away from direct sunlight and on a strong, level stand.

3. Add substrate, decor and equipment

Rinse gravel or sand, place rocks and wood, then install the filter and heater.

4. Cycle the tank

Run the filter for 2–4 weeks with a bacteria starter so ammonia and nitrite drop to zero.

5. Add fish slowly

Start with a few hardy fish and float the bag for 15–20 minutes before releasing them.

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