HTH 52026 Super Shock Treatment Swimming Pool Chlorine Cleaner, 1 lb (Pack of 12)

Product was as described and was delivered on time.

Product killed the algea and turned the water blue.

Powerful Shock, But Messy to HandleI’ve used a lot of pool chemicals over the years, and this HTH Super Shock definitely packs a punch. A single bag clears up cloudy or green water quickly and leaves the pool sparkling clean within a day. It works exactly as intended—fast and effective at raising chlorine levels when the pool needs a reset.That said, there are some things to keep in mind. The packets tend to be a bit messy to open, and if you’re not careful you’ll end up with powder on your hands or deck. I’ve also noticed that it can leave a slight residue on the bottom if it’s not stirred in well, so I make sure to pour it slowly around the perimeter and brush afterward. It’s also pretty strong stuff—handle with gloves and don’t stand over it when opening, because the chlorine fumes are sharp.Overall, it’s an essential pool care product if you want reliable shock treatment without having to measure out from a big bucket. The convenience of the pre-measured bags is great, though storage and handling could be cleaner.Bottom line: Effective and convenient shock treatment that keeps my pool clear, but be prepared for some handling mess and strong chlorine fumes.

Exactly As Described. Excellent shock for the pool. I recommend

I have experimented with various types and brands of shock for my pool and this one provides the most value for the money.I've tried the large buckets of shock that have 73% Cal Hypo (the active ingredient in sanitizing your pool). They are very heavy (50%) and I always used more than necessary with the scoop. I've also tried other bags of shock with 68% Cal Hypo. Oddly, they were rated to treat 10,000 gallons per bag.These bags contain 56.44% Cal Hypo and are rated to treat 13,500 gallons. I have found them to be just as effective as the more expensive bags. I have a 15,000 gallon pool and only use 1 pack about every 4 days depending on pool usage. That's the same rate I used with others without getting any algae buildup.One more tip: I found the effectiveness improved when I started mixing the shock in a bucket of water first. They tell you to do that to protect the liner but I've also found in roughly similar conditions that the Free Chlorine lasted longer when I pre-mixed it.

I used to use this product often. I had a recurring subscription through Amazon. One time I used it and later noticed a HUGE stain in my pool shortly after. I didn't know the stain was a reaction from this product immediately. I balanced my pool, bought stain removal (spending spending spending), followed all instructions to the T. EVENTUALLY, I got the stain to go away after a lot of time, money, effort, and frustration. So fast fwd. Next time I had to shock my pool, WITHIN MINUTES, it stain my pool again. But not just in that spot, literally in every spot the product touched the floor of my inground pool. I sprinkle it SO lightly, I literally walk around the pool like 3 or 4 times and salt and pepper it in just to try and prevent it from accumulating anywhere on the bottom of the pool. Alas, it does not matter. So I cancelled my subscription after having used this product for years. My feeling is that with the rise in costs on chlorine tablets, HTC seems to have taken the low road and changed the ingredients comprising their product. Nevertheless as a consumer, I will waste no more time or money on it. I will keep my pool balanced and stain free using other brands and products.