Unless I missed something, I don't understand how you can have a cya (stablizer) reading at all. You said in the first post that you hadn't added any chemicals yet you report a cya reading of 50. That isn't possible. CYA is something that has to be added either directly or through a stabilized form of chlorine such as trichlor pucks or dichlor powder. It is not in your water supply.

Also, another option for buying the Taylor K-2006 we recommend is to order it from Amazon. com through this link so that PF gets a donation in the process. More info in the following thread:

http://www.poolforum.com/pf2/showthread.php?t=10006