I know I've seen this mentioned in the past, but I can't find any relative posts right now....
Normally when I add DPD powder to my pool water sample, the sample stays pretty clear (I can very easily see some of the loose DPD granules swirling around near the bottom as I'm mixing the sample, for instance). But just recently I've noticed that the sample is getting quite cloudy after I add the powder.
Anyway, is this cloudiness indicative of anything that I should be concerned about? Something is certainly different. In the past I've had pretty low CYA levels, and recently I did bring the CYA up to a more "normal" level (around 40 ppm). Is the CYA making the difference?