Aquatic plants like Spirolina platensis can help clean up polluted water and protect fish from harmful substances. A study looked at how sodium sulphate affects Nile tilapia and how Spirolina platensis can help. They found that sodium sulphate decreases certain proteins in the fish's blood, but Spirolina platensis can counteract these effects. The fish exposed to sodium sulphate had higher levels of certain enzymes and oxidative stress, but Spirolina platensis helped lower these levels. Overall, increasing sodium sulphate in water can harm fish, but Spirolina platensis can be a natural way to protect them from toxic effects.