johnsjets said:I bought a case of 4 bottles and the date stamped on the case read, "09 APR 09", so I am assuming it's still relatively fresh. I don't have the proper test equipment to actually test the percentage of sodium hypochlorite in solution, so I'll have to wait to use to find out, probably in a few days.
Just as a follow up to anyone that's interested:
Added 1/2 gallon of the 12.5% liquid shock last evening (TC and FC levels near 0). This morning the TC an FC levels were at 2PPM. Allowing for the overnight losses,this reading would seem to be consistent with the percentage values printed on the label.