Marie is definitely the expert on this mater in my opinion and you are in excellent hands. Something I do when going through an "ascorbic acid treatment" is add some 60% polyquat algaecide. You can get it for under $20 at the local pool store, Home depot or Lowes. This gives me a little peace of mind and I don't know if it attacks the ascorbic acid or not (Marie?). My treatments seam to work like a charm (thanks once again Marie! )
The cloudy "like milk" water is something I've never personally experienced. It may be normal but just out of curiosity, what is your CH (calcium) level?

Dave
16K gallon Fiberglass