Not the best of deals but Walmart here in NY/LI area has 1gal 10% "Pool Essentials" for $3.64. But, they have a 2 pack for $6.44 (so a small break to $3.22/gal).
The OSJL store that I go to sources their chlorine from three different manufacture that I have seen:I have an Ocean State not too far from me and they had the same price. Couldn't find a date code but it looked like freshly stocked jugs, fwiw.
The OSJL store that I go to sources their chlorine from three different manufacture that I have seen:
Pool Tech Shock from James Austins Company, Mars, PA (I believe the stock actually comes from their Massachusett's manufacturing plant)
Diamond Clear Mega Shock from Amco Inc, Woonsocket RI
Super Shock from H.Krevit & company, New Haven CT
Regarding date lot codes, both Pool Tech and Super Shock products have date codes marked on either the jugs or the case box. Amco doesn't date code their Diamond Clear Megashock at all. I confirmed this via an email to them. They said that their product is on OSJL floor within a few days of manufacture.