Features: 1.SAFE: Multi layer thickened aquarium filter pad with the latest nano bio sponge and fibre bio sponge filters that do not produce cotton fibres and particles to ensure the safety of fish. 2.6 MEDIA: Aquarium filter mat with 2 three dimensional grid cloth, 2 activated carbon cotton, 1 nano bio sponge, 1 fibre bio sponge 6 types of filter media to maintain good water quality. 3.FILTRATION EFFECT: The three dimensional grid cloth traps larger particles, the activated carbon cotton, nano bio sponge filter and fibre bio sponge filter filter out very fine impurities and bacteria. 4.REUSABLE: Fish tank filter pads are finally bonded together with high strength eco friendly resin for strength, easy cleaning and can be cleaned many times. 5.APPLICATIONS: Filter pad is suitable for freshwater or saltwater aquariums, pre filters for wet and dry filters, for sewage tanks, pond, fish and vegetable symbiotic systems, etc. Specification: Item Type: Aquarium Filter Pad Material: Filter Cotton Size: Approx. 50 x 11 x 2cm / 19.7 x 4.3 x 0.8in PackageList: 1 x AquariumFilterPad Note Manual measurement, please allow some errors.