| Summary: | The lack of clean water sources, due to the presence of pollutants in water, is a major issue in many countries, including Malaysia. To overcome this problem, various methods have been introduced, including phytoremediation treatment. Therefore, this phytoremediation study examined the ability of five aquatic plants—<i>Centella asiatica</i>, <i>Ipomoea aquatica</i>, <i>Salvinia molesta</i>, <i>Eichhornia crassipes</i>, and <i>Pistia stratiotes</i>—to remove three pollutants—total suspended solids (TSS), ammoniacal nitrogen (NH<sub>3</sub>-N), and phosphate—from aquaculture wastewater. Using wastewater samples, each containing 50 g of one of the plants, the pollutant levels were measured every two days for 14 days. The results showed a drastic decline in the concentration of pollutants, where <i>C. asiatica</i> was able to remove 98% of NH<sub>3</sub>-N, 90% of TSS, and 64% of phosphate, while <i>I. aquatica</i> showed the potential to eliminate up to 73% of TSS and NH<sub>3</sub>-N, and 50% of phosphate. <i>E. crassipes</i> drastically removed 98% of phosphate, 96% of TSS, and 74% of NH<sub>3</sub>-N, while <i>P. stratiotes</i> was able to eliminate 98% of TSS, 78% of NH<sub>3</sub>-N, and 89% of phosphate. <i>S. molesta</i> was efficient in removing 89.3% of TSS and 88.6% of phosphate, but only removed 63.9% of NH<sub>3</sub>-N.
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