 Chlorine is known to react
with organic matter in the water to form trihalomethanes (THMs), a suspected
carcinogen. Using Sodium Thiosulphate you can create a home-made
mixture to remove chlorine from your pond water.
Recipe:
Make a solution consisting of 4 ounces (1/4 lb) Sodium Thiosulfate
crystals (photo or technical grade) dissolved in 1 gallon of distilled or deionized
water. Use 5 ml (1 teaspoon) of the solution for each 10 gallons of makeup water to
neutralize up to 3.75 ppm chlorine. One cup can be used for each 500 gallons.
(The entire one gallon of solution will treat about 7500 gallons of tap water.) The
shelf life of the solution is about six months when stored in a cool location. The
crystals will keep for several years if kept dry.
NEVER use chlorinated
tap water to clean your bio converter (filter) media unless you are actually trying
to sterilize it. Water from the pond is a much better choice for this
task. |
