Yes, use the sodium bisulfate you have, until your pH is around 7.2, or until you run out.

Don't worry about the phosphates, but that level of iron can cause brown or orange stains. The stains don't bother everyone to the same degree, and they are not harmful in the slightest to people. But, until I know what you want to do about the iron, I'd rather have the pH low, which reduces the chance of staining.