General description This 2-piece aquarium filter amplifier set features a double aquarium filter with 4 replacement sponges designed for both biological and mechanical filtration. Made from high-quality, non-toxic plastic and sponge, this filter is environmentally friendly and safe for your fish. It effectively improves water quality by cultivating nitrifying bacteria, ensuring your aquarium water remains clean and crystal clear. Technical specifications Material: High-quality plastic and sponge Type: Biological and mechanical filtration Includes: 4 replacement sponges Installation Adjustable water drain hose allows for customizable direction and height of water flow. Compatible with 2 suction cups for easy installation anywhere in the aquarium. Can be hidden on the back wall of the aquarium and used as a pre-filter or secondary filter. Usage Removable sponges for easy cleaning or replacement. Use tank water instead of tap water for cleaning when changing the water. Rinse and squeeze