Fluval C2 Activated Carbon Filter Media, 3 count; Remove impurities and dyes from your aquarium with Fluval C2 Activated Carbon Filter Media. Fish waste, food and other organic matter can cause odors and discoloration in your aquarium which can lower water quality. Fluval C2 Activated Carbon Filter Media eliminates most liquefied impurities, odors, dyes for a healthy, clean aquarium. It is suitable for freshwater and marine aquariums and is exclusively designed for Fluval C2 Power Filter. Chemical filter media that works to remove fish waste, food, and other organic matter that can lower water quality. Improves water quality in fresh and saltwater aquariums. Provides superior adsorption qualities. Effectively eliminates odors, discoloration, and impurities from your aquarium. Improves water clarity and keeps tanks healthy and fish thriving.