Doing the CYA test


Active member
Jun 13, 2010
Pensacola FL
What is the best way to do the CYA test. I have a K 2006 and usually hold the tube at waist level. Where should the sunlight be for the most acurate result. I think I saw a thread about this somewhere but I can't find it.


TFP Expert
LifeTime Supporter
Feb 23, 2008
Denton, TX
Also, try to test at around the same time of day each time you test. Small variations in the amount of available light can make a huge difference in what numbers you will get.

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