I converted from Baquacil to SWG (about 65 gallons of bleach and 3 days). I also ordered a new DME filter to replace an undersized sand filter. Conversion went more quickly than I expected, so my new equipment wasn't ready to install. So trying to speed things up (oops?), I started adding 3# of CYA granules (via broadcasting) before plumbing in the new filter and SWG. It mostly disappeared overnight so I added an extra 4# via broadcasting. It was 90%-ish gone the next day when I swapped out the filter.
My question:
When I measure CYA, it comes up as zero. Am I flubbing the test? Did all the CYA eventually end up in the filter and get thrown away? I didn't really notice it as I removed the sand, but I didn't comb through the sand either. My TF100 kit is new, so the chemicals should be good.

If it sat in the bottom and didn't get vacuumed up, be patient. It can take a week or so to register. But if you vacuumed after adding it...you know the answer. I bet next time you read the directions and hang it in a sock in front of the returns.

If only all the information for everything was posted in 1 thread. Believe me, I did a lot of reading here before and during my conversion. Not once did I see the sock method until I started searching for CYA problems and then I saw it.
I searched my discarded sand and didn't notice CYA pieces, so I'll give it another day or so and do another reading. thanks for your response.