Eco-CompleteTM Planted Aquarium Substrate is mineralogically and biologically complete, giving you luxuriant aquatic plant growth without nuisance algae! Iron rich Eco-CompleteTM eliminates the need for laterite. No artificial dyes, paints, or chemical coatings. Eco-CompleteTM has highly porous spherical grains for optimum diffusion performance and contains live Heterotrophic bacteria to rapidly convert fish waste into natural food for your aquatic plants. It establishes a natural biological balance which makes cycling a new aquarium faster and safer.