Pool vacuums are designed to adapt to both above-ground and inground pools. The type of pool vacuum you choose will depend on the type and design of pool, as well as the texture of the pool floor. Pool vacuums are available in various sizes and weights and operate either manually or automatically. Manual pool vacuums tend to cost more than automatic vacuums; however automatic models last longer and require less maintenance. Suction vacuums, robotic vacuums and pressure vacuums are the most popular pool vacuums. The most expensive types of pool vacuums are robotic which cost over $4,000. Suction and pressure vacuums are available for as little as $160 online.