<![CDATA[Goldfish is one of Indonesia's most popular ornamental fish due to their high economic value. The high market demand for goldfish led to increased production and intensified cultivation. The intensification can impact water quality and increase waste production. This can affect the availability of supportive cultivation land and increase the water demand. Using an aquaponic system in Goldfish cultivation is a viable solution that can help maintain water quality and reduce high waste production. This study aims to evaluate different types of plants in reducing Total Ammonia Nitrogen (TAN) and assess the impact of different plant types on goldfish growth. This study used goldfish with a stocking density of 12 fish in each container (15 liters). The study employs an experimental method and a completely randomized design (CRD) with 4 treatments and 3 replications. The treatments of Goldfish culture were without plants (A), Lactuca sativa (B), Amaranthus tricolor (C), and Brassica oleracea (D). The observed variables included Dissolved Oxygen, pH, temperature, TAN, nitrate, absolute fish weight, absolute fish length, plant length, Feed Conversion Ratio, Specific Growth Rate, and Survival Rate. The results indicated that different plant types significantly affected TAN reduction and goldfish growth (P<0.05). The best TAN reduction and growth were observed with A. tricolor (95% probability). Amaranthus tricolor effectively reduced TAN levels and enhanced goldfish growth. This study provides valuable information on the impact of different plant types in lowering TAN levels and improving goldfish growth in an aquaponic system.Keywords: hydroponics, kale, lettuce, recirculating, spinach]]>
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