A garden pond or water feature can be both pleasing to the eye and ear. Such a pond can also be a water source for your houseplants, flower beds and vegetable garden. Not only is water an essential element for plant growth, but trace amounts of nutrients and dissolved organic matter in the pond water can feed your plants' roots and encourage lush growth. Landscapers and gardeners that plan to water their shrubs and plants with pond water should ensure the water is sterilized to protect the plants from any waterborne diseases in the pond water.
Boil a container of water on a kitchen stove to sterilize it. This option is ideal for sterilizing small amounts of pond water.
Fill a 5-gallon bucket with pond water and set aside. Potassium permanganate--a natural oxidizer--will be used to sterilize this pond water, a method ideal for quickly sterilizing large amounts of water.
Measure 0.04 grams of potassium permanganate on a gram scale. A gram scale can be purchased at many specialty shops and health food stores. Potassium permanganate can be bought at most hardware stores and some pool supply establishments.
Stir the potassium permanganate into the 5 gallons of pond water in your bucket. This results in a chemical concentration of 2 parts per million (ppm), which kills any bacteria or viruses in the pond water without posing a risk to your garden plants.
Water your plants with the sterilized pond water, whether you used potassium permanganate or boiled it. Water according to your plants' needs, as hydration requirements vary widely by plant species and soil material. Typically, plants thrive when kept in well-drained, moist soil. It is usually time to water if the soil is dry 2 inches below the surface.