Unless he is talking about a different kit, he says he got the Taylor K-2006 already. If that is the case, and your CYA reading is from testing done with the K-2006, it means that it actually could be much higher than 100 since no kit can differentiate at any levels higher than that. Dilute your water sample and run the CYA test again. Take one part pool water and mix it with one part distilled water. Run the test with that sample and then multiply the result by 2. if you still get a reading of 100, dilute it one part pool water and two parts distilled and multiply the result by 3. Repost with your number after doing this.

By the way, there is an online demo about using the Taylor kit. It might be helpful for you:

http://www.taylortechnologies.com/pr..._slideshow.asp
http://www.taylortechnologies.com/Ch...P?ContentID=11

Hope this helps.