Our pool was green so we gave it a shock treatment and immediately the pool water turned a rust color. I took our (over the pool ledge) salt generator and noticed a rust color coming from it. After cleaning it is now coming out without the coloring. I'm afraid whatever was coming from it had stained the water. What do I need to do? All levels are where they should be except calcium a little low at 100 & phosphate is too high 200.