Size of 20" x 30" x 4"cm, 30PPI Pre-Filter Foam Sponges Sponge filters provide both mechanical and biological filtration, capturing large pieces of waste and don’t get clogged easily < p>Can be cut to fit your filters Used for any aquarium or pond filter Filter media pad is safe for aquatic animals and is made without dyes Suitable for freshwater or saltwater aquariums The regular cleaning can be reused after cleaning
