Went to a nearby pool store for the first time to get a full set of numbers. My kit does not test for CYA, but I added it based on the directions on the CYA bottle and I added 4 pounds, which was the full bottle. Since then I have probably only replaced around 6" of water in the pool. Anyway, the guy at the store said I have ZERO CYA, which does not seem possible to me, based on the fact that water replacement is the only way to lose CYA, and I have not replaced very much.
So is it even possible that I could really have no CYA at all?