We left for Boston on July 1st and didn't get home until the evening of the 9th. 8 full days away from the pool with no one testing or adding anything. I did have a neighbor on stand-by to check the skimmer in case we had any storms or wind, but other than that, the pool was on its own.
Came home to a sparkling pool with just a little dust and a few leaves in the deep end.
I think I have it dialed in