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Member's Mark Quick Dissolving Shock 20lb with 10 Test Strips

I have been using Member's Mark for over 5 years with no problems, same quality as your typical pool supply stores at much cheaper prices.

Gets the job done at an affordable price!

This product clears the water but leaves the water very cloudy. Worse shock product have used in 20 years. I do not recommend.

Terrible Product

The absolute worst. My pool has been green for the past almost 2 weeks. Smh. Never should have bought it! DONT BUY!!!!!

worst by far

What a waste of money, used two seasons. But this season will not clear my pool of algae. I've read it's missing a chemical that is needed. Read up...

Loyal sams customer

Best purchase

Used to be a great value , but not so much anymore

too bad the pricing has doubled

Don't waste your money as I did - this stuff is garbage!

Garbage

Not worth the price.  I had to use twice the amount of product.   Clorox works much better.

Do buy.

Definitely recommend this pool shock

Used this product all last summer worked  great  for me

Started using in June and could not figure out why algae was worsening. Should have read the reviews. The more I added the worse the algae became. Will be returning it.

Made algae worse

Works very well, used it for a few years but due to COVID, got into using calcium hypochlorite type stuff, big mistake. After a complete cluster on opening this year, finally got the pool looking right by abandoning Calcium based shock and going back to this stuff.
The only downside is the incredible price rise over the last 2 years, way beyond what I would have expected even given our rampant inflation.

Member photos