Welcome Al
First lose the bleach and go with iodine and use kool aid to taste (remember to let the water sit for at least 30 min before drinking)
I think it works better than bleach (has a longer shelf life than bleach) Do you have a regular can opener (hand crank) or a Mil-surplus P-38? My DW and son and I all carry a P-38, also wrap the outside of the Halogen bottles w/ duct tape (patch your tarp or what ever you may need to).
Mike