Cubefilter 30PPI Black 3" x 3" x 3"

The basic cubefilter is a simple internal filter that is air-driven: cubes of Poret® foam are glued with silicone onto a tile used as a base. In principle, you could use any stone or slate plate but silicone sticks better to a ceramic or porcelain tile since it has similar properties as glass

Ideal for a 2.5-10 gal tank