Next, flush the pot with rain water or melted snow, which are very low in all salts. Some of the salts in the soil will dissolve in the water and drain away. Flushing with tap water will leach some salts away, but because the tap water itself will be high in salts, it is not as effective as rain water or melted snow. Watering houseplants with a strong tea solution will help to offset the damaging effects of high levels of salts in the soil. A more direct approach is to reduce the salt content of the water before using it.
Some homeowners boil water to remove the salts.
This procedure does remove some salts, which build up as a scale inside the kettle, but many salts remain in the water. There are a number of different systems for salt-removal available to the homeowner. Before I discuss them, here are a few more facts about water and salts. Saline water has a high concentration of many different salts, including calcium and magnesium. This is the system most commonly used by homeowners to soften water for laundry and washing.