SUPER ONE DENITRO SUBSTRATE NUTRIENTS , 1. Contains natural peat extracts and above 40 kinds of nutrient elements protected in advanced bio-membrane for aquarium plant, such as iron, calcium, magnesium, potassium and zinc. Slow-discharging nutrients for over three years in gravels will only furnish the root development and induce new root well promotion rather than encourage algae growth. 2. Contains high concentrated nutrients tablet that supply the fast effective nutrients for those plant need more nutrients than the ordinary ones. Insert the tablets into the gravels that plant roots develop. The nutrients tablet will dissolve completely and leave no any pollution residua at the substrates. 3. SUPER ONE DENITRO SUBSTRATE NUTRIENTS has substantial energy formulation to supply the denitrification bacteria (Pseudomonas denitricans) in denitrification for removing the nitrate in aquarium. Since the nitrate is removed, the algae growth will be strongly yield and pH value will keep at normal range, water quality will be naturally purified in the processing to release the fish stress. The SUPER ONE DENITRO SUBSTRATE NUTRIENTS is not only the high efficient substratum nutrient but also a biological filter needs no power!