Got the test kit refills when Taylor had them on sale this spring and just recently opened the R-0870 DPD powder. Some of the granules are gray in color, and I notice when I use it to test the water is cloudy (after I add the powder). Results remain the same as they have previously, but every container I've had in the past has had pure white granules. Like I said, doesn't seem to impact the test but curious if this is okay to use or if it somehow is contaminated.
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