Quote Originally Posted by albacore45 View Post
...99% pure triclor powder...
Trichlor is stabilized chlorine and has CYA in it when it's pure. Dichlor is also stabilized and yields 9ppm CYA for every 10ppm FC.

Leslie's CYA test also is unlikely to be able to tell 100ppm CYA from 200ppm CYA.

If your water's new, How did it get so much CYA in it?