This inground, automatic pool cleaner works great for all types of pool; concrete, vinyl, fiberglass. This Kreepy Krauly cleaner moves across the pool with ease traversing the pool floor and walls, sucking up all the dirt and debris in its path. The Kreepy Krauly is one of the most dependable cleaners with its simple design that uses only one moving part. Leave behind the worries of gears, belts, debris bags, and wheels. This cleaner allows you to spend more time relaxing and enjoying your pool while the Kreepy Krauly does all the maintenance work. Note: This pleated seal model Kreepy Krauly is designed to work on all pool surface types, however, the seal does wear out slightly faster on gunite/plaster pool surface. If you have a gunite or plaster pool, the flat seal version is recommended.