Features: 1.Replacing the paper filter elements is part of the daily maintenance of the tank. Replacing a conventional filter elements can be very expensive. These washable and reusable foam filters will reduce your costs. 2.This foam filter can survive in the carton and can be washed and reused multiple times. 3.It is recommended to replace one carton per week, and these foams can be easily cleaned and replaced. You should see the foam filter last for about 2 months. 4.All you have to do is remove the filter when you impacts the electrode rod, as excessive chlorination will cause the foam to rupture quickly. Normal levels of chlorine and bromine disinfection are good and these foams have been tested at normal levels. Notice: Actual color may be slightly different from the image due to different monitor an effect Please allow 1-3cm deviation due to manual measurement Description: 1.Material: Sponge 2.Size: 100*200mm Include: 1/3 x Swimming Pool Filter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin