Effectively absorb fish waste and debris, and provide crystal clear water. Key Features: • Included: • 40x Ceramic Bio Media Blocks • Dual-purpose filtration. • Aquarium filter media can be used for mechanical filtration to catch fine particles and biological filtration for raising beneficial bacteria • Premium ceramic bio media blocks covered with thousands of tiny porous holes not only provide a large surface area for biofiltration but also filter out sparkling clear water • Media block effectively absorbs fish waste and debris, providing crystal-clear water for fish to thrive • Each block measures 6.2″ long, 1.5″ in diameter, and approx. 90 grams • Can be cracked into any size needed • Use the filter media in freshwater aquariums, planted aquariums, sumps, and ponds • Please note that it is not suitable for saltwater aquariums • Colour: Yellow • Material: Ceramic • Made in: China • Dimensions (HxWxD): 16x4x4 cm • Weight: 0.1 kg • Package Weight: 4.2Kg • Manufacturer's Warranty: 1-year Warranty.