M. Hamid, T. I. . Nasution, R. . Elfinita, H. Wijoyo, and I. Isnaeni, “Reducing Ammonia (NH3) Levels in Fish Cage Water Using Activated Carbon Adsorbent Derived from Purple Corn Cob”, sci. technol. indones., vol. 9, no. 3, pp. 669–681, Jun. 2024.