Interesting note... we went into Leslie's yesterday for the first time. I asked them what they carried, he said 31.45%. I said, oh, the full strength, great! He said that you cannot buy full strength in box stores anywhere because it's not allowed. You can buy it in the pool store because they have special storage of the bottles. I told him that other people are buying full strength in stores and he told me "people have no idea what they're buying". I thought that was a little rude, as if we're all too stupid to understand? Anyway, it must be a CA law, or maybe a city law? But that explains why I haven't been able to find it anywhere. It does come out cheaper to get it there than the 1/2 strength at OSH, but I kind of didn't like their attitude. Hmmm...