Just wanted to reiterate this from Pooldoc's earlier post..There is one exception. If you turn your pump and filter off overnight, and find that the iron has settled to the bottom, leaving clear water on top, you've got a third option. You can VERY carefully set up your vacuum system --- without disturbing the iron on the bottom --- to vacuum to waste, by siphoning onto the ground. Then you can vacuum most of the iron out. If you go this route, you'll want to fill the pool to flooding first, so you have some water to spare.

IN answer to your last post, just remember that you'll have to make frequent additions of chlorine until you get some stabilizer in the water, because the sun will consume a lot of the chlorine. Let us know how it's going!!

Janet