Get your fish tank sparkling clean with Tetra Whisper Filter Cartridges. These filter cartridges are designed to work seamlessly with your aquarium's filtration system to keep your water clear and healthy for your fish. The pack includes two cartridges, each of size Small, which are suitable for a tank capacity of up to 10 gallons. These filter cartridges are perfect for those who have an internal filter in their aquarium. They are specifically designed for fresh water, making them ideal for anyone who wants to maintain a clean and healthy environment for their fish. Order now and get your pack of Tetra Whisper Filter Cartridges delivered to your doorstep, free of charge!