Iron in pool water can cause reddish-brown discolouration of the water as well as staining on the sides and bottom of the pool. One of the most common sources of iron is from the fill water. It is often found in wells and other rural water sources. It can also be found in some fertilisers, and can of course come from outside debris contaminating the pool.
To remove iron from the water:
- Test the water to determine how much metal is present.
- Backwash the filter.
- Add 250 mL of Pool Magnet per 10,000 litres for every ppm metal in the water. The maximum dose at any one time is 750 mL per 10,000 litres.
- Use Quick Clear according to label instructions for your filter type and size.
- Backwash as needed.
- For maximum effectiveness, Pool Magnet should be added when the chlorine residual is 5.0 ppm or less or the bromine residual is 8.0 ppm or less. Do not shock the pool for 5 – 7 days.
To remove iron stains from sides or bottom:
- Test for iron in the water and treat as above for the metal in the water, pouring the required amount of Pool Magnet directly onto the stains. A piece of plastic pipe can help direct the Pool Magnet onto stains on the floor of the pool.
- As before, do not exceed the maximum dose of Pool Magnet of 750 mL per 10,000 litres at any one time.