As a recent first time hot tub owner I have been diligently testing my water with the color test strips for PH, Alkalinity, and MPS, as these are the three things I am using along with the ozinater and N2 cartriage. I can see the colors on the strip but at times it is hard to determine just what color is in which range (maybe a little color blind). I have noticed that many of you talk about specific numbers of PH such as 7.12 and alkalinity and hardness as if you have a meter that gives the exact readings. I wouldn't mind buying a reasonably priced meter to get a "correct" reading. Do they make good meters for the various readings or are they way out of sight for the average home owner? Suggestions on what I would need and where to purchase them would be great!