NAPCO went up to $2/gal after tax for 12.5%. Still a steal! I'm a frequent customer there now and it's about a 10 minute detour on the way to and fro work. I struggle with the carboys too but found a spout on Amazon that helps... I'm thinking about getting a 30 gal drum next summer to minimize trips but I'm not sure if it will degrade too much if it's in the garage for a month... I transfer it to a HASA chlorinator each week, about 5 gallons per week...In Houston TX and surrouding burbs, the best price I have found is NAPCO Chemical in Spring (roughly FM 2920 and Spring Cypress rd.) Its $1.68 for 1 gallon of 12.5%. 5 Gallons was $9.40 after tax. Make sure you have an appropriate contrainer, and that it has a large fill opening, as their hose is at least 1" OD. Too bad it is far away from me. Works out to $.13 per oz. !!!!
Next best I have found is Aldi's, $1.39 for 8.25% 64 oz. works out to $.26 per oz.
Leslie's pool in Sugar Land is $18 for four gallons of 12.5% (guy said maybe 15% on phone, really doubt that though.) I have not bought here. $.28 per oz.
They are getting back in the game in our neck of the woods, too. Julian date was 357 and was $3.64/gal (at least I *think* that's how much it was).Last weekend, I saw Walmart putting out their Pool Essentials liquid chlorine. I checked the dates and they were from November '19, so not leftover stock from last summer.
Menards is were I got mine last year,,,were in Iowa are you? DesMoines here...Menards: Being based in Wisconsin, Menards should at least be listed there too. From their web site: "stores located in Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, Wisconsin and Wyoming"
Also Menards has Crystal Bleach 8.25% (by weight) 121oz normally for $2.97 but is frequently on sale (as it is now) for $1.99, useful when the 12% is not on sale. It is where I buy all of my chlorine in Iowa.