The K2006 or 2006C goes up to 50 ppm; that's one of the main reasons we recommend it. Another is that Taylor's phenol red continues to give fairly accurate pH test results up to 10 or 15 ppm of chlorine, vs 3 - 4 ppm chlorine from many other blends. If you already have a Taylor K2005, you can get *just* the FAS-DPD chlorine test; I think it's a K-1515.

Anyhow, links to Amazon for these items are found on the Amazon kit page in my signature. One caution: the Amazon seller, Amato Industries seems to be pretty consistently the cheapest and also more reliable than some others. We've seen some problems with other sellers shipping K2005 kits instead of K2006 models. Amato seems to restock in a day or two (they are located VERY close to Taylor), so if the link shows another seller, wait a day.