Do you have plans of getting it into a brackish set up? These gobies can live a short while in freshwater but, this is an estuarial species that will demand increasing levels of salinity into the light brackish range of SG 1.005 to 1.008.
Despite the large mouth, this species is primarily a sand sifter and rock algae scraper, feeding on algae and the micro-invertebrates associated with coastal environments.