Features: Premium aquariums filter media effectively eliminates yellow water, odors, and harmful substances while maintaining clear water quality through activate carbon and quartzes ball filtration. Use plastic housing with high adsorption activate carbon and integrated bioballs creates better bacterials colonizations surfaces for balanced water ecosystems. Great for freshed water and saltwater aquariums enthusiasts searching low maintenance water purifications solution that support fish health and tanks longlasting. Perfectly integrates into canister filters or sump systems to maintain pristines water condition of home aquariums, breeding tanks, and fish display. Multistage filtration system combines mechanical, chemicals, and biological purifications to reduce water changes while promoting vibrancy fish coloration and vibrancy across tanks size. Specifications: Component: activate carbon, plastic, quartzes ball Product Size: Approx. activate carbon size 10x10cm/3.94x3.94inch, box size 11.2x11.2cm/4.41x4.41inch Type: 01/02/03 Package Includes: Type 01: 1PC activate carbon cubes with Box Type 02: 1PC Box Type 03: 4PCS activate carbon cubes with Box note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color the item.