HTH Pool Shock, Cal Hypo Formula, 13.3oz, Pack of 2 | Swimming Pool Care | Chlorinator | Boosts Chlorine Levels

The HTH shock works so much better than others I have used. It dissolves so much faster its amazing. It keeps my pool crystal clear all season long and just 1 bag a week for upkeep. I have tried many others and they either take forever to dissolve or it seems like i need to use more often. I strongly suggest using HTH for your pool needs its so easy to use.

I was so bummed out—I could not get the water in my pool clear. It was clean—but cloudy. I dosed it with this stuff. The first dose didn’t really help. So 24 hours later, I repeated the treatment. Viola! Crystal clear water. I’m so happy. And it’s going to be 90 today. I know where I’ll be.

It's a great product for getting saltwater pools ready for the year.Our cheap OEM cover failed over winter leaving our pool green and nasty looking. 1 bag made noticeable results in 4 hours and had the water clear by the next day.

Honestly, one of the best shocks for your buck. It is pretty cheap for what it does. It dissolves fairly quickly, easy to open, clears up the pool in an hour or so, and it last for a few weeks.

I have a 15' Intex pool things go green once in a while even though I usually keep 3" diameter chlorine tablets in my skimmer accessory. I throw in about half this package and by the next day, its all great and there really isnt much of a chlorine smell or issue.

best shock ever don’t waste your money on others, cleared up algae that inferior shock did nothing for.it is durable and has great chlorine content. we bought clorox shock because it was cheaper and had algae, but once we put this shock i. pooled, cleared it overnight

This box will last us all summer. we have a smaller above ground pool and I use about 1/4 of a bag every week and it works perfectly

Can’t beat the price. From what I can feel it works as well as the higher end brands at about 25% less, depending on what sales you find.