What causes hair to turn green?
Most people you ask will tell you that it is the chlorine
in swimming pool and hot tub water that causes hair to turn green, but
that is actually a myth. Chlorine in pool and spa water causes metals
such as copper, iron, and manganese to oxidize. Think of what happens to
copper used in pennies, pots and pans, and architecture over time, the
process is the same. After exposure to elements and over time the copper
turns from its original color into a greenish turquoise as the minerals
oxidize. Repeated exposure to the oxidized metals floating in
chlorinated water can often cause light colored hair to appear to have a
greenish tint. So contrary to popular belief it is actually metal in
the water turning hair green, not chlorine.
Now, what to do about it?
Using a metal removing compound that is compatible with your sanitizer like ProTeam Metal Magic or Pristine Clean Metal Control, can help remove the metals from your spa water and into your filter where they can easily be removed with a filter cleaning.
Controlling the metals in your water will also help out with stain and scale build up on your spa walls and in pumps and heaters.