3 pieces of yellow sponge,7.9” (Diameter) x 1.4” (H); 3 pieces of blue sponge,10” (Diameter) x 1.4” (H).Our pressurized bio-pond filter wool is available in two different densities, expertly removes suspended particles, sediments, and organic matter.
All sponge filter paper pads are effective in trapping debris, food scraps, waste or other impurities in the water. They prevent them from entering the aquarium and keep the water clean. Provides biological filtration and fully removes excess harmful substances. The sponge mat is made of soft collapsible foam with high elasticity and good air and water permeability. No need to worry about sucking the fish away. And due to the fluffy internal structure, it won't obstruct the normal water flow.
Note: Due to the vacuum packaging the sponge pads may look thinner, which does not affect the filter effectiveness and you can soak them in water for 5-10 mins to get its original dimension.
Suggestion:Replace it every 2 to 4 weeks to maintain a healthy water environment.