A problem salt-system pool owners encounter is that the pH rises over time. If the pH is over about 8.3, then your chlorine is rendered partially ineffective, meaning you can have a high free-chlorine reading, but it is restricted. Test the pH and add muriatic acid to maintain your pH is between 7.4 and 7.6.
Proper water chemistry instead of neglect. Long filter periods and a clean filter.
It is not the salt water pool or the salt water that is turning your hair green. It is a poorly maintained pool with a chemical imbalance - pH and total alkalinity out of required parameters.
You have to treat pool water with pool chemicals and use a pool filter to get and keep the water clear.
First of all bomb it with extra chlorine. if that does not work try hitting it with an algaecide, Keep in mind that many salt water pools can not handle metal based algaecide.
Your water is turning green due to algae. You need to scrub your pool walls to and then "Shock" your pool by adding chlorine. Keep your pool filtered and it should clear up in a few days.
Algae will develop in untreated water turning the water green and or foggy. If it is a swimming pool, and you don't mind, it can be treated with chemicals that you can get at the big box hardware stores or a pool supply place. If the pool is for fish you can use a biological filter and pump system.
Are you using iodized salt or pool salt? I've read that the iodine in the iodized salt will leave yellow staining in the pool.
Do not use blue (copper) algecide. If you have already added too much blue algecide in the past, the only way to remove it is to buy a metal remover at your pool supply or do a partial drain and refill of the pool water. Pool Masters
Green
Check the chemicals with a pool test kit sold at most stores like Walmart or Kmart or a pool store. It shows how to check for PH balance and Chlorine. You must keep your chemicals balanced or the water will get cloudy or worse, green.
there is a chemical chelating agent called Metal Free this takes the metals out of well water
The pool turned green in Rio due to an imbalance in the pool's chemicals, specifically the pH levels, which caused algae to grow and give the water a green tint.