❀Specifically designed for 304B/404B/3000CF500 aquarium , ensuring seamlessly fit and optimal filtration for clean and water. ❀Features foam and activated carbons composite to effectively remove suspended particles, organic pollutants, and odors for clear water. ❀User friendly design allows quick installation without the need for tools or professional assistance, simplifying maintenance. ❀Made from materials that are harmless to water life, ensuring a safe habitat for fish and plant. ❀Ideal for both freshwater and saltwater aquariums, suitable for home aquariums or commercial display tanks, providing long lasting and efficient water purification.