Since nitrate levels depend on many factors such as number of animals, feeding patterns as well as the age and chemistry of the tank. It is important to monitor and keep these levels as low as possible for the best health of our aquatic pets. Pura Nitralock has a tremendous capacity for binding nitrates in both fresh and saltwater aquariums. It is finally possible to maintain a truly pristine environment with continuous near zero P.P.M. nitrates.