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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 801-810 of 823 reviews
Jun 20, 2021
Reviewer name: stephchern
1 out of 5 stars
1 out of 5 stars review

These Tabs are Terrible

I wish I could get my money back. I have never had so much trouble maintaining a chlorine level in my pool until using these tabs. It’s my terrible luck that I’d try them during a year when there is a chlorine shortage!! I’m actually mad about this!!

Helpful?30FFO4C17W7N15359760490
Jun 16, 2016
Reviewer name: rajak
1 out of 5 stars
1 out of 5 stars review

Definitely would not recommend this product

I bought this and we had nothing but problems with with our pool. Never could get any chlorine to register. Worked and worked, many trips to for water analysis at pool store. More shock (don't get that at Sams either) and finally, we had had enough. Drained the pool, refilled and used another brand of chlorine and presto, everything is good. Not sure what is wrong with this stuff, but is horrible chlorine.

Helpful?30FFO4C17W7N15359760490
Jul 19, 2025
Reviewer name: CaseyW
3 out of 5 stars
3 out of 5 stars review

Good but not so Good

This has been a great product for us for 7 years and have noticed how the price has stayed the same but the product went from 50 to 40 lbs and Sams and other companies thinks the consumer is not paying attention. Thats is why i have shopped this product at other online stores for same or lower price with delivery.

Helpful?30FFO4C17W7N15359760490
Sep 2, 2015
Reviewer name: Prunella
1 out of 5 stars
1 out of 5 stars review

Chemical problem

I bought a tub of these last year. Excellent. So I bought another tub this year and have been using them regularly. I started getting a rash all over my body. I didn't think it was the chlorine - I thought it was my bathing suit or that I had been using an inner tube and thought it was the friction of my kicking my legs. Hard to explain. So, I started switching suits, using vaseline on my legs, bought some 'slide' that pros use to prevent chafing. Nothing was working. The itch and sting were horrible. Then I got my dog to finally swim with me. Since he went in, he's been licking his legs, scratching and is acting like I did. I think something wrong with this tub of chlorine. I wish I would have stopped using it ages ago. A whole summer of miserable times in the pool.

Helpful?30FFO4C17W7N15359760490
Jun 26, 2015
Reviewer name: 1stankindug
2 out of 5 stars
2 out of 5 stars review

you get what you pay for, and this is not what you want. These tabs plus their brand shock locked up my pool chemistry. had to drain most of the water, refill and used shock and tabs purchased from a pool supplier. yes it does cost more on the front end but less in the end.

Helpful?30FFO4C17W7N15359760490
Aug 1, 2023
Reviewer name: Joe
3 out of 5 stars
3 out of 5 stars review

Bucket lid

Come on Sams club,it took me 45 minutes just to get the lid off the bucket! What engineer designed that lid!?

Helpful?30FFO4C17W7N15359760490
May 26, 2025
Reviewer name: Michele
5 out of 5 stars
5 out of 5 stars review

null

I highly recomend these granuals.I buy them every year.My pool water is clean and clear. It is definitely the best price Ive found yet.

Helpful?30FFO4C17W7N15359760490
Jan 12, 2025
Reviewer name: markrob
2 out of 5 stars
2 out of 5 stars review

Purple

Product works good, but the big problem is that whatever binder they use in these tabs stains everything purple.

Helpful?30FFO4C17W7N15359760490
Jun 11, 2021
Reviewer name: Annoyed Mother
1 out of 5 stars
1 out of 5 stars review

Does not dissolve

I would not purchase these. My chlorine level was consistently testing 0 even after having 3 tabs in for days. I had to start adding liquid chlorine. These tabs do not dissolve.

Helpful?30FFO4C17W7N15359760490
Jun 18, 2020
Reviewer name: not a fan
1 out of 5 stars
1 out of 5 stars review

do not buy

I would never buy this product again. They are not slow dissolving and are going thru them quickly. I normal use the Clorox ones but this was a little cheaper you pay for what you get worst buy.

Helpful?30FFO4C17W7N15359760490