I'm going to return as much of the chlorine free shock as I can.

I bought most of the items for the stain removal. Did you ever find out if the Culator can be used in the way you made in that post (soaking it)?

Does the 4ppm Culator actually absorb 4x as much as the 1ppm? Why are there different versions for winter and spring? Their descriptions seem to imply that they absorb different metals?