AQUANEAT Replacement Sponge Filter Media Pad Compatible With VIVOHOME/VEVOR/VIVOGROW 1580/1840 GPH or SUNSUN CPF-2500/3500 Pressure Pond Filter for Koi FishBrand: AQUANEAT Color: Yellow, Blue Features: Replacement Sponge Filter Media Pad for SUNSUN Grech CPF 2500 CPF 3500, VIVOHOME VEVOR VIVOGROW 1580 1840 GPH Pressure Pond Filter 2 pieces of yellow fine sponge; 2 pieces of blue coarse sponge Yellow sponge: 9 (Diameter) x 2 (H) Blue sponge: 9 (Diameter) x 2 (H) 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