"The purpose of the ZEOvit system is to easily and reliably create, and maintain, a poor nutrient environment in marine aquaria similar to a the natural reef environment. The goal of the system is to reduce nutrients as nitrate and phosphate without lowering the levels of important minerals, like calcium and magnesium, and carbonate hardness, which are also adjusted to a natural reef environment.
In order for the ZEOvit method to be successful, a few fundamental husbandry techniques and equipment components must also be included in your aquarium's design and operation. These requirements include strong and efficient skimming, lighting appropriate and sufficient for the aquarium's inhabitants, regular weekly water changes, addition of elements at low levels, non-excessive addition of nutrients, and optimum and stabile water parameters (Ca, Mg, KH, Salinity)." - A General Review of The ZEOvit System by GaryW