One CYA test should not deplete the reagent. Most kits have enough to test it at least 3 or 4 times. Plus, the CYA test doesn't need to be repeated more than once a week and once you get your level where you want it, probably no more than once a month ---- unless you continue to use a stabilized form of chlorine like trichlor or dichlor.

Regarding copper ------ you do NOT want copper in your pool. Contrary to popular belief, it is not chlorine that causes light-colored hair to be stained green, it is the copper.

Read a lot of the stickies at the tops of the various forums and also go read at our sister website www.poolsolutions.com. Then come back here with specific questions and we'll try and help.