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Abstract. Paddy fields in the Rancaekek area, Bandung Regency-Indonesia, has been contaminated by textile wastewater. The area needs to recover back to its normal condition and function. Several compounds were found in the soil, such as Cu, Zn, Pb, Cd, Co, Ni, and Cr. Phytoremediation was selected as a site remediation strategy, which employs plants to remove non-volatile and immiscible soil contents. The objective of the study was to determine the ability of Equisetum debile to absorb Cu from the contaminated soil. Cu measurement was conducted by using the AAS (Atomic Absorption Spectrophotometer) method. The study has shown that Equisetum debile can absorb Cu concentrations of up to 25.3 ppm in 60 days after initial planting. However, the Enrichment Coefficient value (0.392) indicated that Equisetum debile was not efficient as a hyperaccumulator plant.

The purpose of this research are to understand Koi Fish's (CyprinusCarpio) adaptation ability to Epicentrum river water condition; to determine its adaptation time to Epicentrum river water; to determine the size of Koi fish that most potential to be planted in Epicentrum river; and to determine a simple method that potential for Koi fish cultivation in the Epicentrum river. The research was using quantitative experimental methods, three aquariums size of 100 L completed with water pump, filters, activated carbon, anti-ammonia stones and bio ceramic systems were used in the experiment. The first aquarium is control, the second aquarium (maximum intervention)was intervened with Epicentrum river water, extra filter, treated with pH control and fish medicine, while the third aquarium is only intervened with Epicentrum river water, without extra filter, pH control and medicine (minimum intervention). The result shows that Koi fish can live in Epicentrum river water, but require gradual conditions for Koi fish to get used to the environment; the length of time for adaptation is 3 days; Koi fish that suitable to be planted in the Epicentrum river is 6 cm -8 cm in size; and Koi fish can live best in condition with minimal intervention.