I have an Aldi up the highway selling 6% for $.99 for the 96oz bottles. I watched the impact on my FC as I started using it and it is working like it should in terms of raising the level in the pool, so I am pretty sure it is really 6% (pardon my skepticism, it's a Jersey thing). Not bad. Bought 10 cases. Got the classic "that's a lot of bleach" from the register person, so I said, "it's between Memorial Day and Labor Day, I wear a lot of white!"

Anyway, I think that's a little cheaper overall than the carboys, but that's real math?