Enclose your submersible pump in this Active Aqua Submersible Pump Filter Bag, zippered filter bag to prevent pump clogging. Filters all forms of biological and nutrient sediments common to hydroponic reservoirs. . Fits most pump sizes up to 1000 GPH. Ideal for flood & drain and drip hydroponic systems. High quality filter material keeps pump clear of debris. Gusseted bottom ensures proper pump seating. Pump can be easily removed from bag for cleaning. Secure, corrosion-proof zipper at top for easy closing.