What do I need to set up an aquarium?

The basics are a suitably sized tank, a filter, food and water treatments, plus a heater for tropical fish. You also need to cycle the tank before adding fish.

How big should my first tank be?

Bigger tanks are more stable and forgiving for beginners, since water conditions change more slowly. Stocking depends on the species, so research your fish's adult size and needs first.

What does 'cycling the tank' mean?

Cycling builds up the beneficial bacteria that break down fish waste, making the water safe. It takes a few weeks and should be done before adding fish, not after.

How to Set Up an Aquarium: A Beginner's Guide

An aquarium is a wonderful thing to have, but rushing the setup is the fastest way to lose fish and get disheartened. The secret isn’t fancy equipment, it’s patience and stable water. Get the basics right and take your time, and you’ll have a healthy tank that’s a joy to keep. Here’s how to start.

The short version

Choose a tank on the bigger side for stability, add a filter (and heater for tropical fish), then cycle the water for a few weeks before adding any fish. Patience at the start saves heartache later.

Choose your tank and the essentials

Start with the tank and the kit that keeps it healthy:

A tank, ideally bigger than you think you need, since larger volumes stay stable more easily.
A filter to keep the water clean and healthy.
A heater if you’re keeping tropical fish.
Food, water treatments and a test kit to look after the water.

Bigger really is more forgiving for a beginner, so don’t go too small to save space.

Cycle the tank before the fish

This is the step beginners skip and regret. Cycling builds up the helpful bacteria that process fish waste and keep the water safe. It takes a few weeks, and it needs to happen before you add fish, not after. Test the water as you go, and only add fish once the readings are right.

The right food for your fish is part of a healthy setup. Check price on Amazon →

Add fish slowly and research first

When the tank is ready, add fish gradually rather than all at once, so the filter can keep up. Research any species before buying, since adult size, temperament and how many can live together vary hugely. A little homework here avoids overcrowding and mismatched tank mates.

Keep it healthy

Ongoing care is simple but regular: partial water changes, checking the filter, feeding the right amount and testing the water now and then. Overfeeding is a common beginner mistake, so a little and often beats a lot at once.

Ready to choose?

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