Blond or tinted hair turns green.

Possible reason:

High levels of copper in the pool. This can arise either because of over-use of copper based algicides, or because the pH of the pool water has been allowed to drop to a point at which it starts to corrode the copper fittings in the heater.

Solutions

High levels of copper in the pool. This can arise either because of over-use of copper based algicides, or because the pH of the pool water has been allowed to drop to a point at which it starts to corrode the copper fittings in the heater.