Nitrite Remover for Fluval FX4/FX5/FX6 External Filters, 3-pack

Specially designed for high-performance Fluval FX external filters, the nitrite-removing blocks and resin-impregnated pads work extra hard by acting as an effective filter media for both mechanical and biological filtration.

Main characteristics:

• Are designed specifically for Fluval FX filters;
• Are effective in controlling and eliminating nitrites;
• Effectively trap floating particles (debris, excess food, waste, etc.) to leave 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;
• Are available in a convenient 3-pack;
• Are suitable for freshwater and saltwater aquariums.