Very good shock. Works very well

I don’t think it’s quite as good as HTC shock it

We tried this product for the first time and it is doing a good at a good price.

Really good pool shock!

We love this stuff - works better than some top name brands.

Good price. Works well

Works great, the boxes I purchased before came with test strips. I was disappointed that these didn't this year even though they cost the same.

Great product

Good price

Awesome deal