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Customer reviews for Member's Mark 3" Chlorinating Tablets, 40 lbs. for
Member's Mark 3" Chlorinating Tablets, 40 lbs.
4.6 out of 5 stars
stars
560 ratings275 reviews
  1. 5 stars80% (447)
  2. 4 stars9% (53)
  3. 3 stars4% (21)
  4. 2 stars3% (17)
  5. 1 star4% (22)

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Showing 1-10 of 275 reviews
Sep 19, 2026
Reviewer name: Rusty B
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Chlorine Pucks

Excellent price, but what was the best is that the pucks were not all broken. My usual experience is that the container has been handled roughly and many pucks would be in three or four pieces. That makes it very difficult to place in an automatic chlorinator. Congrats on having a great handling process.

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Jun 8, 2021
Reviewer name: The best
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great value

Couldn't find any tablets with other reatailers that met the same quantity for the price. Looked up sam's club.com, ordered and received delivery the very next day. Conviniently picked up curb side and product was loaded In my vehicle by a professional sam's team member. Highly recommend.

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May 7, 2021
Reviewer name: Roger
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Chlorine Shortage

Chlorine Shortage - bought one 40 pound container of tablets online last week. Free shipping and chlorine arrived early. And, then went to local Sam’s Club to purchase two additional 40 pound containers this week. Sam’s Club 40 pounds is at a phenomenal price when other merchants / pool supply companies are charging twice as much (or more!) for the same product.

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Sep 12, 2026
Reviewer name: no name
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great Product

These chlorinating tablets are excellent. They are individually wrapped which helps prevent breakage.

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Sep 14, 2026
Reviewer name: ray
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

seem to last longer than others

great for when i lock up the house and leave. clean the filter, empty the skimmer, Fill the floaters and go. pool stays clear

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Jul 9, 2026
Reviewer name: CSI
4 out of 5 stars
4 out of 5 stars review

Verified Purchase

Convenient but not perfect packaging

Product does what it's designed to do. The individual packs are great but not flawless. Some packs are already opened before taking them out of the bucket to use.

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Sep 14, 2019
Reviewer name: Woody
3 out of 5 stars
3 out of 5 stars review

Verified Purchase

Great Price

What needs to be done better with this product is that although each Tablet is individually wrapped, several of them came broken up and opened. It does not change the effectiveness of them, but when I set the bucket in my basement for a day and came back down I could smell chlorine. So if each tablet is not sealed better, than all the tablets need a large plastic protective bag that they can all sit in so the chlorine gases do not escape the container.

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May 6, 2026
Reviewer name: Laura
2 out of 5 stars
2 out of 5 stars review

Verified Purchase

Too much of a good thing

Full of stabilizer. Great is you have a sand filter, not so much with a cartridge filter. Had to drain the pool to get rid of the stabilizer. Too much of a good thing is bad.

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May 15, 2026
Reviewer name: Danielle
2 out of 5 stars
2 out of 5 stars review

Releases TOO MUCH CYA

These tablets release way too much Cyanuric Acid (CYA). We just opened our new pool and added stabilizer that would have contributed about 10 ppm. We added two tablets to the dispenser that haven't fully dissolved yet. These tablets should release about 2.5 ppm for a 10,000 gallon pool. Our pool is about 14,500 gallons. I took my first water test into Leslie's and my CYA was already at 31 ppm. It should only be half that. Leslie's said it was happening to other customers who bought their tabs from Sam's. Too much CYA will make your other pool chemicals have to work harder costing you more money. I don't like my CYA to get over 70, otherwise it causes issues. I will have to reduce tablets to 1 tab and probably drain partially before end of season. So while these tabs seem like a bargain, they're really not because it will cost more money to manage the CYA now. So if you use these, monitor your CYA levels and maybe use half the tabs you normally do.

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Apr 19, 2026
Reviewer name: Bob
2 out of 5 stars
2 out of 5 stars review

Verified Purchase

Tabs

They’re good l paid too much for them

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