CLEANS POOL BOTTOMS IN MINUTES! Just attach your telepole and garden hose to the base of the unit and turn on the water! The resulting venturi lifts leaves and debris off the pool bottom and deposits them into the attached bag, keeping them out of your hair-and-lint pot and filter. Great for easy Spring and Fall clean-up. Includes extra-large mesh bag. Universal Leaf Gulper is for concrete or vinyl lined pools.