Hi there -
A few questions. I'm nearly certain I have metal stains as the Vitamin C test works on them and I can tell the liner is stained as well. (I have overall staining and then some concentrated areas of stain scale in corners and on the light, etc).

First question - is there any danger in just saying "forget it - I'll deal with it in the spring" - I'm in Chicago and ready to close, but have plenty of other things going on.

Second - when I do deal with this is there anything special I have to do as I have a heater?

Some stats - 20x40 inground with roman ends (stains in all the corners and creases in the deep end) - approximately 30-35k gallons.

Thanks,
Doug