Jurnal Internasional

Abstract

Abstract. Water quality is one of the factors that strongly affect the cultured fish. Aquaculture practices in coal mining void often face mass death of their cultured fish due to water quality deterioration. The use of aquatic plants is aimed to improve the water quality of the fish cage in coal mining void and especially to improve the organic matter. Water hyacinth (Eichhornia crassipes), water lettuce (Pistia stratiote) and water fern (Salvinia molesta) were applied into the fish cages in coal mining void. The water quality from each cage was examined every day for a two weeks period, to identify the pattern. The results showed that the plants are potential agents for improving the water quality and the organic matter in the fish cages in post coal mining void.