Metals in Pool - Are they dangerous?

I am staining the concrete around my pool, and waited till this past Sunday to do the concrete coping area since the weather people forecasted no rain. Well, as luck would have it, it stormed after I applied two coats of stain. A lot of the stain ended up in the pool, making the pool water dark green.

Since Leslie's is the only pool supply store open on Sunday, my only choice was Natural Chemistry Metal Free. So I dumped three liters of it into my 25K gallon pool, and the water was clear 12 hours later. A water test for metals (iron and copper) 24 hours later indicate no metals remain in the water.

I'm sorry I don't know the answer:o Maybe someone else can answer this, but I do know that once the metals are in the water, you can't get them out - you can only sequester them (that is what a metal remover is) .