You meant for saltwater?
Saltwater is all about equipment and once the tank mature you don't need to do larger water change to bring Nitrate down, also saltwater utilizing the RO water system so the replacement water Nitrate is 0ppm for the most part. Another option is utilize the carbon dosing in saltwater to bring the Nitrate down and can be eliminate nitrate completely out of your tank, running Nitrate reactor system will bring down Nitrate too. Like I said earlier once the saltwater tank mature it's easy to maintain, it's hard for the first year the tank was first setup.
