I have tried different algae control products, but this one is the real deal, it really destroyed the algae other products were not able to.

Removed algae from walls still fighting algae on pool floor; product causes foam not terrible but does not go away

This is the only algaecide I use since trying it years ago. It is concentrated so it requires far less in the pool to get the job done.

Sam’s club products are the best and Sam’s makes it so easy to shop on line instead of waiting on lines in the store

Effective algaecide, but foams. Good for pools without attached spa, waterfalls, or spray features. Otherwise, be prepared for lots of foamy bubbles.

This is the first time I tried this product. I had algae in my pool and now it's under control with Members Mark product.

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!

I bought this product 3 weeks ago, I had a problem with black yellow and green algae in a 20x40 ft in ground concrete pool which is 30 years old. After 3 -12 oz applications all of the algae is gone! No foaming problem it just worked extremely well

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!

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