I've been in this group for a while now but never converted to using liquid chlorine. I've always used calcium hypo. But since I've battled cloudy water for most of this season, I've learned that it's more than likely the cal hypo. Needing to replenish my chlorine, I went looking for other options and found this at Lowe's. I bought 4 boxes. I calculated the price and it should be about $1 cheaper per application than the cal hypo. They had an entire pallet up on a rack in the back of the garden center. When the guy helping us was handing them to my son, one of the boxes leaked and splashed on my son's shorts making white spots so I know it is still potent. The guy said the pallet has been there for a couple of months. None were on the shelf with the Clorox and Pool Essentials brands. I used some last night so I will see how it does. Anyone else use this brand? Is there anything I should look out for when switching?