Nitrite Remover for Fluval 306/307 and 406/407 External Filters, 6-Pack

Specifically designed for high-performance Fluval 07 and 06 external filters, the nitrite-eliminating and resin-impregnated blocks work doubly hard by acting as an effective filter media for both mechanical and biological filtration.

Key Features:

• Specifically designed for Fluval 306/307 and 406/407 filters;
• Effectively control and eliminate nitrites;
• Effectively trap floating particles (debris, excess food, waste, etc.) for clear water;
• Help prevent fish loss;
• Support beneficial bacteria for a very healthy aquatic environment;
• Are custom-fitted to increase filtration performance;
• Should be replaced monthly or as needed after testing aquarium water with the Fluval test kit for optimal results;
• Come in a convenient 6-pack;
• Suitable for fresh and saltwater aquariums.