Use low-phosphate washing liquid and washing powder. Phosphates stimulate algal growth when discharged into the water supply, lowering oxygen levels and killing plants and fish.

• 使用磷酸盐含量低的洗涤液和洗衣粉。磷酸盐排放到水源中，会刺激藻类生长，降低氧含量，杀死植物和鱼类。