I put the sequestrate in last night and woke up to a more green pool; it's much improved. There's a lot of brownish-red sediment on the floor of the pool. Thinking about it now, it's copper from some of the pipes we have in the basement. I guess the thing to do now is vacuum…I'll try vacuuming to the filter first. Might need to add more Metal Free or another product, I suppose, if the one bottle doesn't handle it all.
If metals are your problem, there's better sequestrates than Metal Free.