HTH 52027 Ultimate Shock Treatment Swimming Pool Chlorine Cleaner, 1 lb

This stuff clears up my 18 ft above ground every time. Very effective, at a good price.

It was the item I requested. Fast delivery. Thanks

good deal, works well

It's a good product but ridiculous price point. Not just here, but everywhere.

This product is just what I needed and I really appreciate the customer service from this company.

Great buy !

We use this for our small pool and keep the water nice and clear at a reasonable price.

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.