I have 4 options for water filling. My house supply is from rainwater tanks with water collected from the roofs of my house etc.
1. Trucked in: expensive. The water is treated (quite heavily from the smell of it). This water is the supply for the nearest town.
2. I have a large tank which isnt connected to the house and I dont use so the water in there is probably at least 5 years old.
The tank is leaking a fair bit so I guess it must be quite rusty inside.
3. As the pool will be finished just before winter, I could empty in most of the water from the house tanks, as they will soon fill up again (and then some) from the winter rains. These tanks probably have some rust inside.
4. I have a groundwater soak. This is quite saline. The ground here is pure sand but the water will have percolated down from the hills behind where the soil
in some places (perhaps not immediately behind, I am not sure) is a deep red from all of the iron. I was going to use this water to top up in summer. The SWG has no upper limit for salinity: it can handle sea water according to the manufacturer.
Numbers 2,3 and 4 aren't enough to fill the pool on their own.
Should I be concerned about the iron and or rust components in the water? Are there any other issues I should be concerned with.