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Sam's Club
Sam's Club
Customer reviews for Member's Mark Quick Dissolve Shock, 24 ct. for
Member's Mark Quick Dissolve Shock, 24 ct.
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4.5 out of 5 stars
stars53 ratings12 reviews
  1. 5 stars77% (41)
  2. 4 stars11% (6)
  3. 3 stars4% (2)
  4. 2 stars4% (2)
  5. 1 star4% (2)
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Showing 11-12 of 12 reviews
May 27, 2026
anonymous
1 out of 5 stars review

Chlorine lock

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.

Helpful?7FMBSZNBTUO015370460365
May 9, 2026
RICHARD
2 out of 5 stars review

Not so sure about this shock

I have used 4 cases of this in the past month and it seems like it’s not effective as cal hypo.

Helpful?7FMBSZNBTUO015370460365