Suction-side vacuums are a type of pool cleaning device that use the suction created by a pool's filtration system to remove debris from the pool floor and walls. They connect to the pool's skimmer or dedicated suction line, allowing them to draw in water and dirt, which is then filtered out and returned to the pool. These vacuums are typically easy to use and require minimal setup. They are effective for cleaning various types of debris, including leaves and dirt, making them a popular choice for pool owners. Regular use helps maintain a clean and clear swimming environment.