Iron doesn't affect much of anything, except pools and swimsuits -- those, it turns brown or orange. But it's harmless to people and doesn't really interfere with the chemistry. It CAN make the pool very cloudy.

If you are already up and running, do all these things, and you may find you can operate without lots of complexity:

1. Keep your pH on the low end of the scale (7.0 - 7.4) -- this minimizes the problems with iron.
2. Run your filter a lot, and keep the cartridges clean.
3. Very carefully, use a liquid clarifier, to help your filter remove the iron as particles form.
4. Try to avoid adding a lot of chlorine all at once -- it tends to make the iron drop out all at once. Raising it gradually is better.
5. As soon as you have a complete set of test results, please post them.