The Aqua Products Pool Cleaner Replacement Filter Bag works with all Aquafirst and Aquabot Cleaners. This ultra-durable, reusable filter bag removes fine debris - including sand, silt, bacteria, algae and oil. The bag’s high quality filtration material removes many of the causes of cloudy water, helping keep your pool and spa water crystal clear all season long. this 2 micron fine economy filter replacement bag can be used when replacing the filter bag. For use with single-bag Aqua Products cleaners including Aquabot, Pool Rover, AquaMAX Junior, UltraMAX Units, and AquaFirst In-Ground Cleaners. Easy to remove and clean. Elastic band opening fits around existing plastic frame.