The manufacturing of textiles generates wastewater with a high organic content, which has a major impact on chemical oxygen demand (COD). The purpose of this study is to assess the effectiveness of a floating cage hybrid (FCH) system for decreasing COD in wastewater. FCH is a floating wetland system that incorporates both natural bentonite and Canna indica plants, and it is compared to a control that solely contains natural bentonite. The test employed both textile effluent and synthetic wastewater, with the latter being utilized to prevent multi-solute competition. The reactor operated on a batch system with no aeration for 27 days. At the same concentration, the natural bentonite-based system reduced COD in textile and synthetic wastewater by 25.5% and 36.7%, respectively. Meanwhile, the FCH system reduced COD in synthetic wastewater by up to 69.5%, from an initial concentration of 923 mg/L to 281 mg/L. This proves that the integration of Canna indica and bentonite could boost system performance through synergistic adsorption processes and biological activity. These findings demonstrate that FCH can be a viable alternative ecotechnology that uses natural materials, is low-energy, adaptable, and sustainable to improve the quality of water contaminated by the textile industry.