12Pcs XS Filter Cartridge for Tetra Whisper Extra Small Tanks Filter

Perfect replacement for Whisper Extra Small Filter Cartridges XS; and also works for AquaCulture Aquarium Kits up to 3 gallons, and for Top Fin EF-S and other small fish tank filters; Measures 2.2" x 2.2" (L x W), fits many brands HOB filters. Please check compatibility before purchasing. Replacement for imagitarium H Mini Filter Cartridges; XS filter Cartridge for Betta Fish Tank Kit In a three-layer filtration design, double-layer microfiber cotton can effectively absorb solid impurities such as debris, and fish waste; and the inner layer of activated carbon can absorb odor and discoloration, reduce fishy smell, improve yellow water, and improve water quality. Clearwater provides you with a better fish-viewing effect. Very convenient to replace and install, and even no need to get your hands or even fingers wet Replace the filter cartridge every 3 to 4 weeks if there is reduced water flow. 12 Pack – 1 Year Supply, Continuous, high-efficiency, low-cost, replacement Refills