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Clean pools use a helper called chlorine to keep the water fresh.

Clean pools use a helper called chlorine to keep the water fresh.

Chlorine stops tiny germs from growing in the water. That is the smell you notice at some swimming pools.

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Floating is easier when you spread out flat on the water. Floating is easier when you spread out flat on the water. Kickboards help you learn to swim. Kickboards help you learn to swim. Goggles help you see clearly under the water. Goggles help you see clearly under the water. Always swim with a grown-up watching to stay safe. Always swim with a grown-up watching to stay safe. The biggest swimming pool in the world is over 1 kilometre long. The biggest swimming pool in the world is over 1 kilometre long.