Aquael Hypermax Sponge PPI 20 Black is a high-quality filter sponge designed for effective mechanical and biological filtration in aquariums. With a pore size of 20 PPI (pores per inch), it balances water flow and surface area, allowing beneficial bacteria to thrive while efficiently trapping debris. Suitable for both freshwater and marine environments, this sponge is easy to cut and customize, making it perfect for various filtration applications. Enhance your aquarium's water quality with Hypermax Sponge PPI 20.