OK, my mistake. I reversed the 18/10 in my quick calculation. A couple quick questions: does this product contain a clarifier? Or will I need to buy a separate product for that? Where can I actually buy it? The orendatech.com site does not appear to have any sales functionality. I checked Amazon but they only sell 5 and 15 gallon sizes (a wee bit more than I need). A few pool sites appear to offer the smaller sizes, but not at the price you mentioned. Thanks.