Most of the cage fish farms today are located in river courses close to industrial areas and also urban areas. Therefore, this farming is exposed to the danger of pollution from oil spills, dyes, dissolved chemicals and so on. Solutions need to be taken to overcome this problem because this pollution can cause the deterioration of the quality of farmed fish, water pollution in the cage and even the death of the fish in the cage. NATKAP is an innovation of trapping oil and suspended river waste for fish cages by using Kapok absorbent material. Kapok was chosen as a dirt absorbent material because it has a high ability to trap dirt such as oil and so on. The results of this study show that 98.93% of the oil can be absorbed by the Kapok material. In addition, the use of Kapok also improves the quality of river water in cage fish farming areas. Kapok morphology structure that absorbs watery dirt is found to expand and appear brighter. Therefore, the result of NATKAP's innovation is very suitable for use as a filter material for fish cages because Kapok, which is the adsorbent material, is able to remove suspended oil at a high percentage and also improve the quality of river water.
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