How Do You Set Up a Healthy Aquarium?

A beginner’s guide to starting your first fish tank

Starting your first aquarium is exciting, but setting it up correctly is essential for keeping fish healthy. Below are some of the most common questions beginners ask when starting out.

What size aquarium should beginners choose?

Many people assume smaller aquariums are easier to maintain, but larger tanks are usually more stable.

In small aquariums, temperature and water quality can change quickly, which makes it harder to maintain safe conditions for fish. Larger tanks hold more water, which helps dilute waste and keeps parameters more consistent.

For beginners, an aquarium of around 60 litres or more is often a good starting point.

Tank

What equipment does an aquarium need?

A healthy aquarium relies on a few essential pieces of equipment.

Filter – Removes waste and houses beneficial bacteria that help keep the water safe.

Heater – Most tropical fish require stable temperatures between 24–26°C.

Lighting – Allows you to view your aquarium and supports plant growth if you keep live plants.

Substrate – Gravel or aquarium soil placed at the bottom of the tank to support plants and décor.

Together, these components create a stable environment where fish can thrive.

Tropica Plants

Why does an aquarium need to cycle?

Cycling an aquarium allows beneficial bacteria to establish in the filter.

Fish produce waste that releases ammonia, which is toxic in high levels. Beneficial bacteria convert ammonia into nitrite, and then into nitrate, which is far less harmful.

Allowing the tank to cycle helps ensure the biological filter is ready before fish are introduced.

How quickly should fish be added to a new aquarium?

Fish should be introduced gradually rather than all at once.

Adding too many fish at the start can overwhelm the filter and cause ammonia spikes. Introducing fish slowly allows the biological filtration to adjust to the increasing waste levels.

How often should an aquarium be maintained?

Regular maintenance keeps an aquarium stable and healthy.

Most aquariums benefit from:

  • Weekly water changes of around 20–30%

  • Regular water testing

  • Removing uneaten food

  • Occasional filter maintenance

A consistent routine helps prevent many common aquarium problems.

If you want more information on how to set up your perfect aquarium please get in touch our staff are always happy to help!

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