Designed specifically for Fluval 07 and 06 high-efficiency canister filters, the nitrite-removing, resin-impregnated blocks work twice as hard as an effective filter media for mechanical as well as biological filtration.
Are designed specifically for Fluval 106/107 and 206/207 filters;
Are effective in controlling and eliminating nitrite;
Effectively trap floating particles (debris, excess food, waste, etc.) to leave water clear;
Help prevent fish loss;
Support beneficial bacteria for a very healthy aquatic environment;
Are custom-tuned to increase filtration efficiency;
Should be replaced monthly or as needed after testing aquarium water with the Fluval test kit, for best results;
Come in a handy pack of 3;
Suitable for freshwater and saltwater aquariums.