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Customer reviews for Member's Mark Algaecide 40 1 Gal., 2pk for
Member's Mark Algaecide 40 1 Gal., 2pk
4.5 out of 5 stars
stars326 ratings110 reviews
  1. 5 stars77% (251)
  2. 4 stars10% (34)
  3. 3 stars3% (9)
  4. 2 stars2% (7)
  5. 1 star8% (25)

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Showing 91-100 of 110 reviews
Jul 4, 2021
bonnie
5 out of 5 stars review

Verified Purchase

Good Product

Works great, good price

Helpful?58XSVDVYVGQR7874225534
Sep 24, 2021
M F
4 out of 5 stars review

Verified Purchase

Works quickly

Does what it says

Helpful?58XSVDVYVGQR7874225534
May 16, 2023
BB3
1 out of 5 stars review

Doesn't work and creates huge amounts of foam...

I do not recommend this product. Using this Member's Mark Algaecide 40 created a significant amount of foaming, which had never previously happened with any other product in the 18 years I've had my pool. Even worse was that it was ineffective and I had to purchase a different product elsewhere to re-treat the pool and get rid of the algae.

Helpful?58XSVDVYVGQR7874225534
Apr 5, 2023
Triple 5
5 out of 5 stars review

Works Great

I just bought and used this. Ignored the pool all winter in NoCal because of all the rains. It was cold and kept the algae at bay but there was a bloom holding steady. Had shocked the pool, swept, cleaned filters (2 huge cartridges for 35k gal pool). Things were clearing but very slowly and with the warmer weather the bloom was ready to explode. I put in about 32 oz. and swept some more. Ran the sweep and pump 24 hrs. Much better. Some foam but not much and nothing that lasted. You could see a clear oil slick on the surface likely due to all the algae lipids and enzymes. I put skimmer socks on both baskets. The sock material would quickly clog up with algae debris. I am washing these out at least twice a day along with the sweep bag. Will add some clarifier in another day (day 3) and clean filters again on Day 5. I expect to have sparkling clear water within a week of addition. Will continue to use as maintenance all year. It is taking care of my algae problem nicely and for a decent price.

Helpful?58XSVDVYVGQR7874225534
Apr 23, 2022
Cody
1 out of 5 stars review

Foaming pool crazy

I wouldn't buy this again pool foaming like crazy not going away. Gonna have to do something else

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May 30, 2017
John
5 out of 5 stars review

Good value and worked well

This algecide is the best value I can find . No foaming issues so far.

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May 22, 2022
Charlie
5 out of 5 stars review

Best product I have found

Used as directed at end of last season. Had the best and cleanest pool opening in nearly 20 years of having this pool. 16x32 in ground - Northeastern PA

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Mar 13, 2024
Robin59
1 out of 5 stars review

DO NOT USE!

Right now in the process of draining and refilling our pool due to the metals this product put in our water. Looked like a bubble bath after using. Pool company said only was to correct water was to drain. DO NOT USE!

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Jun 28, 2023
Jujumel
1 out of 5 stars review

Not a good example for Member's Mark

I bought this product because I have used other Member's Mark items with great results. Not so with the algae use. It is not effective on mustard algae which can get started in hot, sunny pools in Arkansas. Money back, please!

Helpful?58XSVDVYVGQR7874225534
Jul 20, 2018
subman631
5 out of 5 stars review

Great product. NO FOAM!

This is a very good, highly concentrated product. Where I normally use 8 or 12 ounces per dose for my pool with other products, this one only needs 4 ounces for 25,000 gallons. AND it works! FOAMING? I haven't a clue what those people are doing but with my salt water pool there is NO foaming.

Helpful?58XSVDVYVGQR7874225534