Nitrate, and Ways to Control It in Saltwater Aquariums

The principle of NNR or Natural Nitrate Reduction filtration is that the nitrifying bacteria does all the work. The three basic NNR set ups one can choose from to reduce nitrate naturally in saltwater aquarium and reef tank systems are as follows:

• Use live rock, or set up a Berlin System.
• Use live sand, or set up a Jaubert/Plenum Filter.
• Use a combination of both live rock and live sand.