Destruction of oyster reefs has resulted in the loss of key ecosystem services provided by these structures in Australian estuaries. However, questions remain as to whether the ecosystem services provided by oyster aquaculture can mitigate that loss. This project used a novel approach to study how large-scale temporal and spatial variations in estuarine conditions are related to oyster aquaculture intensity using remote sensing. Aquaculture infrastructure was mapped at 6 sites in 4 estuaries from 2010-2021. Landsat and Sentinel remote sensing data was extracted upstream and downstream of these sites, and at matched control sites. Two remote sensing algorithms (green:red and blue:red), shown to be related to Secchi Depth in NSW estuaries, were used to examine water color changes upstream and downstream of infrastructure and control sites over time. Results showed that aquaculture infrastructure has the capacity to stabilize water colour across all sites, but the effects on mean water colour was variable between sites. Two out of the six sites showed significant changes in water color upstream and downstream of infrastructure. This implies that aquaculture infrastructure can provide valuable outcomes for estuarine conditions, but that their effect depends on environmental context.