The Wally World kit is a good buy, if they're still in stock (time for Christmas stuff, dontcha know ). I got an hTh 6-way kit there in early summer. It tested for CYA but had enough reagent for only 2 tests . I needed more.

While waiting for Ben's kit, I ordered just a CYA testing kit from Leslie's online, actually ordered 2. I already had kits to do the other tests, just needed more CYA tests. I don't recall exactly how many tests each kit provided, but it was more than 2 each. It looks like the stock number on my kit is 18-563. Hopefully their site will provide more info if you need it.