Back in May I went into the nearby pool store to get a quart of Polyquat. I saw a bottle of "Black Algae Killer" (60% Polyquat) above a sign that read 14.99. But when it was rung up, it was 22.99. So I argued that was not what the sign said so the girl called the manager who took me back to the aisle.
There he showed me that it was 30% poly that was 14.99 and the bottle I grabbed had been misplaced from further down the shelf (Identical Bottles by the way just percentage on the ingredients were different.)
Manager then said to me. "Your water would have to be totally black to need the 60%"
I smiled (and did manage to resist laughing) then left.
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