This method is great for the color blind. I can get my CL readings within .5ppm of the actual which is acceptable to me.

Now if someone would come up with a color blind friendly way to read the PH that would be excellent. Although, my girlfriend is very sufficient at letting me know what the PH is

Now please don't spam me regarding ORP meters because from my research they are not near as reliable as I need unless I plan on spending plenty of money!