Efficient Biological Filtration: Increases the surface area for beneficial bacteria to colonize, breaking down harmful toxins like ammonia and nitrite. Durable Material: Made from high-quality, porous ceramic for long-lasting performance for 5 years. Unique Design: Hollow ring shape ensures optimal water flow and maximized filtration efficiency. Vibrant Colors: Pink and grey rings add a touch of style to your aquarium while remaining functional. Multi-Purpose: Suitable for canister filters, sumps, hang-on-back filters, and more. Upgrade your aquarium's filtration system with our premium Ring Bacteria House, designed to provide a home for beneficial bacteria to flourish. These vibrant pink and grey ceramic rings are perfect for both freshwater and saltwater tanks, enhancing water quality by promoting biological filtration. How It Works: The porous structure of these bacteria house rings provides ample space for beneficial bacteria to grow and thrive. These bacteria play a crucial role in breaking down organic waste, creating a cleaner and healthier environment for your aquatic pets. Usage Instructions: Rinse the rings with aquarium water to remove any dust before use. Place them in your filter or directly in your tank where water flow is optimal. Note: 1 pack treats up to 35 gallons of water, 2 packs treat up to 70 gallons of water. Product Details: Material: Premium porous ceramic Colors: Pink and Grey Shape: Hollow rings Packaging: Securely packed to ensure safe delivery