Hey mark. Thanks for the compliment and tips. There is a sheet of foil in there, it's under the water bag. Don't know how I omiited that from the list. Good catch there. No room for LED unfortunately, as you have noted the space restrictions. I was led to believe that chlor floc is stronger and had some in the way so I included two tablets to handle worse water, and the potable aqua, which I am more comfortable with, for less suspect water.
I'm already at work on an improved version in an identical tin. Thanks again.