The Tetra BF 400/600 plus replacement filter sponge filters the aquarium water very effectively in the Tetra internal filter IN 400 plus and IN 600 plus.
• Settlement of biologically active bacterial cultures in the filter sponge: Harmful nitrite is converted into nitrate
• The sponge structure ensures good mechanical filtration: Small, visible particles are removed from the aquarium water.
• Suitable for fresh and salt water aquariums
