Xedas asked:
It says if there is iron in the water to use Power Ion Adjust or a metal remover for 48 hours but… how do we test for that? Our water is supplied by the county and is not well water, so would it be normal to not have any? Help! 
Alkaline Diet & Diabetes
July 28th, 2010 at 9:13 am
If your water looks red or brown (or sometimes green) after adding chlorine you likely have iron.
Go to your local pool supplier and ask for an iron test kit. You test it the same as chlorine and pH with a color matching test.
To solve the problem of colored water as a result of metals, there are two general approaches:
Shock treat the pool to oxidize the metal, which then settles out of solution and looks like rust. The rust can easily be vacuumed out of the pool.
Add a sequestering or chelating agent which forms complexes with the metal and prevents it from being oxidized by the chlorine.
If the source of the copper or iron cannot be established or if it cannot be avoided, regular addition of a chelating agent or sequestering agent (metal out products) will ensure that any new metal arriving in the pool water will be held in an inactive complex.