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.

the express check out line is redicules long, at least 80 people in lines waiting for check out.

Good price

Awesome deal

Great product

The prices are still to high for the pool products

Though they don't list it, this shock contains cyanuric acid. If you're just doing a weekly maintenance dose it works fine. If doing a higher dose it runs your CYA numbers through the roof.

Absolutely great price! Even cheaper than a discount store I have been buying from. (First time seeing at Sam’s). If you have a vinyl pool this is what to use, as Cal Hypo can damage liners. And for the reviews that complain about CYA (chlorine stabilizer) chlorine block is a myth, all types of this chlorine contains stabilizer, so it is no different than any other that is out there. Oh and of course it’s ground up chlorine, what else is it supposed to be?

This product is not effective. The only time we've battled algae is when using this as the weekly shock treatment rather than liquid shock. We even cycled back to trying again (since we have an entire bulk box of it) once we ran out of liquid shock, and had algae again within 3 days.

I have used it in the past. I believe it caused chlorine lock because it raised my Cyanuric acid and I had to drain almost a whole pool.