Abstract: An improved filter bag is provided for use with a pool cleaner particularly of the type designed for travel over submerged pool surfaces to dislodge and collect debris. The filter bag is generally constructed according to U.S. Patent 4,618,420, to include a primary flow chamber for receiving a flow of water and water-entrained debris from the pool cleaner, and a secondary collection chamber for trapping and collecting the water-entrained debris. A zipper closure on the filter bag can be opened for disposal of debris captured within the collection chamber, followed by re-closure and re-use of the filter bag for a subsequent debris collection cycle.