...sort of gets back to my original thought in this thread. We were saying, "If your pool water is cloudy, the CYA test is invalid"...without qualification. My point is that most cloudy pools aren't cloudy enough to register in a standard CYA test.
So, if we suspect the pool water is turbid enough to affect the outcome of the test, why couldn't we simply put the pool water in the view tube without the reagent and take that reading. Then add the reagent to the pool water and run the test normally. If pool water alone gave you a 20ppm reading and then the standard CYA test gave you an 80ppm reading, you could generally assume your CYA was in the 60 range.
My original thought was cloudy pool water seldom, if ever, gets cloudy enough to give you a 20ppm reading without reagent. That would mean any black object you placed in the pool would disappear when held around 4" underwater. (4" being the depth of water in the view tube to measure 20ppm).
As with anything, there can be extremes. I'm sure there are some pools somewhere that could be murky enough to affect the test but they would, IMO, be pretty hard to find. So, that brings me back to my original thought that we may be using "cloudy pools affect your CYA test" way too much.