In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms - 50 Pounds

The package was originally mailed on time, but tracking showed that there was a problem with shipping, and it was rerouted back to the seller. I had to reach out several times. They responded saying that another order would be sent, but I never received a new tracking or order number, even though I had paid for it and needed it weeks ago. It finally arrived. I love this stuff and have ordered from the same seller in the past without any trouble. That is why they still got 5 stars. It goes a long way since it is a strong concentrate meant to be diluted. I use it around the house and farm, and occasionally to treat my camping and hiking gear.

Good product at a good price

Have purchased this last year and it worked super. Decided while it was on sale to take advantage of the discount. Will order from this seller again.

This is the best shock on the market in my opinion and this is a very good price for 12.

I don’t have alge but I use once a week for maintenance. I have used it twice and it turns my plaster pool dark blue on the quartz and gunite . I was terrified that it had permanently stained my pool . Second time same thing . After running filter and vacuum several hours it looks great . Just not sure why this is happening. I ordered 24 so I have to use all of it I just who’s I knew what’s causing it . Otherwise it’s an awesome product.

Works great at a reasonable price

Works as expected

Throw one in the pool once a week and my pool stays clear and clean. I love the individual packs for easy use.