16-Pack Medium Replacement Filter Cartridges Compatible with Whisper, 20 Gallon

Package Contents: You will receive 16 pieces of aquarium filter cartridges. Enough for you to use and replace. Please note that our product is not sponsored or endorsed by, or affiliated with the brands it fits, including Tetra Whisper. Perfect Fit: Our aquarium filter cartridge is compatible with Tetra Whisper bio-bag filters, including 10I-80GPH, IQ10-105GPH, PF10-90GPH, and Reptofilter 20GALLONS (90GPH). Each cartridge measures about 14x9.1cm/5.51x3.58in, making it ideal for 5-10 gallon aquariums. Please check the size before purchasing. Quality Material: Crafted from premium activated carbon, zeolite, and ion mineralization balls, our aquarium filter cartridge is reliable and durable, ensuring long-lasting performance and effective filtration.4-Stage Filtration System: The aquarium filter cartridge features dual-sided mesh to capture fish waste, uneaten food, and debris; activated carbon removes impurities for cleaner, clearer water; zeolite to control ammonia levels and stabilize pH, and ion mineralization ball for biological filtration, keeping your aquarium water clear and healthy for your fish.

Easy to Replace: Simply remove the used cartridge, rinse under cold water to remove carbon dust, and insert it into the filter. For optimal results, replace the filter every 2-4 weeks, depending on your aquarium system.