Stain Free followed up with Metal Free (both Natural Chemistry products) per the directions on the bottle. It was dark till the metal free went in so I don't know if it got cloudy or not. I do know that the stain disappeared almost immediately when the Ascorbic acid hit the water.
We'll see the results in the morning.

The jug of Metal Free said to run the pump 72 hours then change DE (in my case) but I'm wondering how long I should keep the Cl down??? It does not say --- with the rain that we are supposed to get, I'm a bit nervous with it down around 1.5 ppm and CYA ~50. Any thoughts?? Phosphates are <100 so there isn't anything for algae to eat.