For many years, concrete pools were the most popular choice on the market. Nowadays fibreglass pools are more commonly found in Australian backyards. This is due to their fast installation times and less money and time needed to keep them running and clean. Fibreglass pools continue to be a popular choice as they are durable and affordable. A concrete pool is much more expensive to install and maintain. The interior surface of a concrete pool is porous making it the perfect breeding ground for algae and bacteria; therefore, it will require more effort and money spent on chemicals to keep it safe to swim in. Concrete pools also need to be resurfaced every 10 to 15 years which costs around $10,000.