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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
3,813 ratings807 reviews
  1. 5 stars86% (3,279)
  2. 4 stars8% (290)
  3. 3 stars3% (101)
  4. 2 stars1% (48)
  5. 1 star2% (95)
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Showing 791-800 of 807 reviews
May 26, 2025
Michele
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
markrob
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
Annoyed Mother
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
not a fan
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
Aug 3, 2020
BOB
1 out of 5 stars review

I HAVE HAD TROUBLE SINCE USING THESE . MY CYANURIC ACID LEVELS ARE OUT OF CONTROL . I HAD TO TAKE OUT HALF THE WATER IN MY POOL TWICE SINCE I STARTED USING THESE .

Helpful?30FFO4C17W7N15359760490
Aug 31, 2021
MAC6539
1 out of 5 stars review

junk

i bought these because they were only ones could find with the shortage. i barely get a reading even after doubling up on the amount i usually use.just horrible

Helpful?30FFO4C17W7N15359760490
Jul 13, 2017
BearHB
1 out of 5 stars review

If you want to waste 80$ buy these...

These were a collossal waste of money. As soon as we put them in our feeder for our inground pool, the water became immediately cloudy. Been fighting with it ever since, and to top it off, they dissolve completely about 3 days...terrible.

Helpful?30FFO4C17W7N15359760490
Aug 5, 2021
Pool Owner
5 out of 5 stars review

Why are these in hiding???

They work great.....If I could buy some

Helpful?30FFO4C17W7N15359760490
Jun 21, 2020
cincyguy37
5 out of 5 stars review

never have a cloudy pool again

A couple of these in each intake works great. Maybe a gallon or two of chlorine or two a week.

Helpful?30FFO4C17W7N15359760490
Sep 6, 2019
Joe
5 out of 5 stars review

Fast & easy

Very satisfied I Ordered on a Friday got on a Tuesday! Excellent service

Helpful?30FFO4C17W7N15359760490