A low pH level can have a variety of effects on plants in water. It can cause plant roots to die, lower the number of dissolved minerals in the water, and make it harder for plants to photosynthesize.
The pH of water can have a big impact on the growth of aquatic plants. For example, if the pH is too acidic, it can cause the plant to lose its leaves. If the pH is too alkaline, it can stunt the plant's growth.