I don't have my kit with me so I can't post a photo, but the one I got at Walmart was an HTH (5-way I believe) test kit, not the Aqua Chem shown above. I'm also pretty sure I had to add 5 drops of the blue reagent for hardness. My pool sample did not turn blue but rather a yellow color and after a lot of drops of the second reagent it slowly turned green then sort-of blue. I re-tested on my tap water (which was not used to fill the pool) and it turned blue right away. I received the PS234 kit and that hardness test started with a third reagent - with the PS234 the hardness test worked on the pool water as expected and the hardness was pretty low. It looks like in my case there was something in the water that caused a problem with the 2-reagent test but not with the 3-reagent test (that's probably why the third reagent was added)

The Cl/pH tester in the HTH kit looks the same as the one in the PS234 kit.

Peter