If you are going to be buying a new kit, why don't you get the one that we feel is the best which is the Taylor K-2006 or 2006C (same kit, larger bottle of some reagents). If you buy it through the Amazon link in my signature, the Pool Forum makes a little money on the sale which helps us keep this form online. Only buy if the seller is Amato Industries, however. Some other sellers are substituting the K-2005 which you do NOT want. Having this kit will make your pool maintenance much easier and you won't have to rely on pool stores for readings.