A swimming pool robot is a device that, depending on the model, cleans and vacuums both the walls and the bottom. This dirt is then collected in a filter bag, filter basket or filter cartridge. These devices work according to set times and stop automatically. A swimming pool robot is not suitable for sucking up algae (green water). These algae are so fine that they are quickly blown through the filter and float in the pool water. There are also models where you can control the robot with a remote control or a mobile phone app.