Aquaculture of farmed animals contributes to global food security, but the generation of large volumes of wastewater is a major threat to its operational sustainability. Low-cost wastewater treatment technologies, such as the use of adsorption-based techniques, constructed wetlands and phycoremediation have been investigated for the treatment of aquaculture wastewater. The use of industrial by-products, which are originally regarded as waste, makes adsorption technology a suitable alternative. However, the low removal efficiency of some adsorbents in their natural state is one of the limitations. Constructed wetlands, on the other hand, mimic natural processes and have low-energy requirement, low maintenance cost and are effective in removing both organic and inorganic contaminants. The land requirement, potential issue of clogging as well as the need for technical know-how to effectively design, manage and maintain the ecological system in constructed wetlands, are some of the limitations. Phycoremediation involves the use of algae in wastewater remediation. Since the algal biomass can be further harvested and used in various applications, it increases the process economic benefits. Overall, the use of these technologies for the treatment of aquaculture wastewater remediation should be encouraged, however, there is need to address some of the limitations to ensure their scalability as well as their integration with other wastewater treatment methods, plants and infrastructure.