OK, I opened one of the boxes and checked the jugs inside. Still no date code. I checked the bottom of the jug but did not take a photo. I can imagine some packaging problem where the date code did not get printed on the outside of the box. Since the date code is also not printed on the jugs inside, this seems more like a deliberate decision to not mark the date code.If it's not printed on the box then you have to open it to check the bottles. Yes the whole box is printed but it should look like said box then went through your PC printer. This one would be the 021st day of 2021.
View attachment 636303
On the jug it looks the same way. I like JJ's mill jug comparison. Lol. Day 023 of 2025
View attachment 636304
Yup, in my experience, it probably lost about 1/3 of its potency. 10% is about 6-7%.The KemTek liquid chlorine 2-pack I found at Albertsons is 7-8 months old. So these should be significantly less effective by now even if stored at room temperature? Lowes have them too, so I will look if they have a more recent batch.