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Customer reviews for Member's Mark Chlorinating Granules, 40 lbs for
Member's Mark Chlorinating Granules, 40 lbs
4.7 out of 5 stars
stars
3,835 ratings823 reviews
  1. 5 stars86% (3,292)
  2. 4 stars8% (292)
  3. 3 stars3% (102)
  4. 2 stars1% (51)
  5. 1 star3% (98)

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Showing 1-10 of 823 reviews
Oct 15, 2025
Reviewer name: betty
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

lower the regular price.

Better price! Chlorine has gotten so expensive. There is no real reason for that now the plants are up and running. Sam's club needs to sell it at 79.99 regular price.

Helpful?30FFO4C17W7N15359760490
Jun 11, 2026
Reviewer name: KatCox
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Easy measure, simple dissolve, consistent size

We picked up Members Mark chlorine granules for our pool. The price was great and the product was consistent in size. We were grateful for this product as it helped save the day for our salt pool when our generator went out for a short period of time. Sams Club to the rescue.

Helpful?30FFO4C17W7N15359760490
Jun 25, 2025
Reviewer name: Mike
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Loving this product better than others I have used

Since purchasing our pool, I have been purchasing the 1 pound packs of shock from an online retailer. I’ve been putting one or two of those in each time that I treat the pool. This year, I was not able to get that delivered so I purchased this product from Sam’s Club. I was amazed to find out that just 4 ounces covers a 10,000 gallon pool. That means this product is much cheaper than the 1 pound bags I was purchasing because of its concentration. The pool has been very clear since I began using this. I am so thankful for shortages and inconveniences.

Helpful?30FFO4C17W7N15359760490
Aug 27, 2025
Reviewer name: Sim
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Good product but too costly

I have been using this product for years, it keeps my pool's balanced and clean with less maintenance. However, what I'm only disappointed is the cost which doubled in the past three years, the inflation made me sick !!! Hope the price is brought down soon.

Helpful?30FFO4C17W7N15359760490
Sep 4, 2026
Reviewer name: Samco
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Chlorine granules

Great product at very good price

Helpful?30FFO4C17W7N15359760490
Oct 18, 2025
Reviewer name: Azoasis
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Pool needs

Great value when it’s on sale

Helpful?30FFO4C17W7N15359760490
Mar 16, 2024
Reviewer name: Paula
2 out of 5 stars
2 out of 5 stars review

Verified Purchase

Bring the price down

These have more than doubled in price. I realize the supply shortage and demand during the pandemic raised the price but the supply should be stable now and I feel it is greed either on the manufacturer or retailer or both that keeps the price so high. That’s the main reason for the inflation of many products. Just because they can!! The product is fine but the COST is NOT!

Helpful?30FFO4C17W7N15359760490
Jul 4, 2024
Reviewer name: Joe b
2 out of 5 stars
2 out of 5 stars review

Verified Purchase

Chlorine or gold

I had a super hard time finding the chlorine in stock. I finally bought some for $199 / 40#. Then it goes on sale and they wouldn't do a price adjustment for me. They said I had to return and rebuy. Ridiculous!

Helpful?30FFO4C17W7N15359760490
Nov 5, 2023
Reviewer name: Anonymous
1 out of 5 stars
1 out of 5 stars review

Verified Purchase

Great product, not so great price

Great product, but way too expensive. Used to be $90 and now it’s $200. I heard there was a major chlorine tab supplier that burned down, but that was a few years ago, so don’t understand why the price has not come down

Helpful?30FFO4C17W7N15359760490
Aug 16, 2026
Reviewer name: anonymous
1 out of 5 stars
1 out of 5 stars review

Loaded with CYA - causes chlorine lock!

When people buy shock, they don't need cyanuric acid in their chlorine granules. I bought and used this and my CYA levels skyrocketed. I was growing algae and dumping more and more of this in the pool. I finally realized I was chlorine locked and this was the problem. Save yourself a headache. Buy a CYA product, not this product.

Helpful?30FFO4C17W7N15359760490