Foam Sponge Made of high-quality foam and polyurethane, odorless, environmentally friendly, and with high-density mesh structure, which can filter out many impurities in the pool. Our filter sponge foam is thick enough, moderate density, soft and elastic, not easily deformed, corrosion resistant, and can be used for a long time. Our type A filter sponge can be cleaned and reused, with fast filtering speed and good air permeability. Our filter cartridge sponge is an ideal replacement for disposable filter paper and can help you save costs. Each cotton filter can be used for approx. You can clean the filter sponge once a week to keep the water clean and reduce bacteria in the swimming pool.Pool filter foam is suitable for swimming pools, baths, spa pools, aquariums and other occasions. A must-have tool for families and aquariums.Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and weather. display, there will be a certain color difference, depending on the physical object received.