The aquaculture industry has witnessed tremendous growth globally in the last 50 years and currently contributes to a production of over 50 million tons. Consequently, this growth has environmental impacts as well. Aquaculture wastes contain nitrogenous compounds such as ammonia, nitrite, and nitrate as result of uneaten fish feed and excretion. Thus, there is a significant interest in mitigating these wastes from aquaculture streams. The goal of this research is to use low-cost adsorbents to treat aquacu ltural nitrogenous wastes. Pine bark biochars-doped with nitrogen were synthesized and characterized for physical and chemical properties. Current research is underway to determine the efficacy of these nitrogen-doped biochars via batch adsorption systems for removing ammonia and nitrate from model aquacultural wastewater streams.