uxcell 2 Pcs 75mmx65mm Aquarium Fish Tank Water Cleaning Biochemical Filter Sponges Black Sponge filters provide both mechanical and biological filtration Suitable filter when breeding and spawning Discus, Dwarf cichlids, guppies. Size : 75 x 65mm/ 2.9" x 2.5"(H*D) Product Name : Biochemical Filter Sponge;Material : Sponge Package Content : 2 x Biochemical Filter Sponges