Replacing the paper filter is part of the daily maintenance of the pool and may be costly. These washable and reusable foam filters help reduce expenses. This foam filter can be placed in the carton and can be washed and reused multiple times. It is recommended to replace the filter weekly. These foams can be easily cleaned and reused, lasting up to approximately 2 months. Remove the filter when performing electrode rod maintenance, as excessive chlorination may cause the foam to degrade quickly. Normal levels of chlorine and bromine are safe for these filters, which have been tested under standard conditions. Color: black Material: foam Package Contents: 1 * Foam filter Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement may vary by +/- 1-3 cm.