Abstract: A filtering apparatus, for preventing contaminants of water from entering a pool from a pool inlet having a screw-on cap, includes a stretchable elongated member and a securing member. The stretchable elongated member includes an open end portion, a closed end portion, and a body portion extending between the open end portion and the closed end portion. Further, the securing member is coupled to a periphery of the open end portion. The securing member is capable of being disposed on a peripheral edge of the pool inlet to enable removable coupling of the stretchable elongated member to the peripheral edge of the pool inlet via the screw-on cap for enabling accumulation of the contaminants of water in the stretchable elongated member.