There have been several threads reporting the results of dumping granular CYA down the skimmer. The results are not good, as the CYA partially dissolves into a slurry, runs into a bend in the pipe, and stays there, clogging the pipe until it is physically removed. Here's one I found with a quick search:As I'm pre planning all these steps, I noticed the preference to put the CYA into a sock and dangle into the pool to avoid damaging the pools surface. Local Pool Store told me to dump the granules into the skimmer with the basket out so it will get caught in the DE filter and dissolve over time. Bad idea? Did that maybe do damage?