So I went to Leslie's yesterday to get some liquid 10% HOCl. I had a buy 2 get 1 free coupon as well as having filled out my buy 10 get one free card (the equivalent of a 10% discount).
PB tells me that I'm better off getting Cal Hypo because it's 73% and therefore would be cheaper. Ignoring the CH issue, I told him he was wrong.
If I spread that discount out to each purchase, it's $4.50/jug (sales tax included) for each 2Â½ gallons less the 10% "frequent shopper discount" = $4.05
I paid for two ($8.10) and got three. So that's 960oz of 10% HOCl - that gets me about 55ppm (per pool calculator) or 14.7Â¢/ppm
The same $8.10 using Cal Hypo gets me 2-16 oz bags so only 12ppm (again, per pool calculator). Roughly 67.5Â¢/ppm. To get equivalent 55ppm, I'd have to put in about 142 oz or 9 bags. At $4/bag, that's $36.
(I'm sure someone will come along with a more graceful way to prove it out, but it's Monday)
So, for a bit more hassle (lugging jugs back and forth), it's worth a six pack of Stella a week. Even if I don't have the coupon(every so often things don't line up), my cost is $22Â¢/ppm, worth a six pack of Miller Lite a week.
More money in my pocket, less in PS's bottom line!