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Recirculation aquaculture systems (RAS) are gaining popularity among producers due to high productivity and low ecological impact for the production of aquatic food. Water quality management has always been considered though to be one of the most important aspects of (RAS) systems from both perspectives: ensuring an appropriate environment for fish development and growth and reducing nutrient pollution discharge. In RAS systems, total ammonia nitrogen produced by fish as a result of protein catabolism it is common...