The study aimed to clean up acidic tofu liquid waste by using a combination of Pistia stratiotes and Eichhornia crassipes plants. Different amounts of these plants were added to the waste to see how they affected the pH and plant appearance. The results showed that all treatments increased the pH of the waste, with the best result seen in the treatment with 25g of Pistia stratiotes and 75g of Eichhornia crassipes. This treatment also showed the best plant morphology, with green leaves and stems.