Anyone with a swimming pool will know that they have to be kept clean so the pH of the water is maintained and it is safe to swim in. Automatic pool cleaners are one of the best ways to ensure debris is removed and your pool does not develop mould on the walls or floor. Having your cleaner chugging away will remove most of the debris from the bottom of the pool, making it much easier to keep clean.
It’s not that hard to scoop leaves and other floating rubbish from the top of the pool when you use a long handled scoop, but it tends to sink after a few hours in the water, so anything that blows in after dark will likely sink before morning. Getting it up off the bottom of the pool is very difficult with a scoop.