Found that my local club had in stock even though online said they were out. This is the first season I'm using this algaecide hadn't known Sam's had their own brand and for the price I'm giving it a try. The ingredients are the same as some other algecides I have used, paying for a quart what these two gallons cost. I normally use as a preventative, so as of now can't say how it works to get rid of algae and as long as my pool stays algae free I guess I can say it works. Oh, had some bubbles after adding intial dose, no foaming, you just have to be careful to not add more than what it says to.

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.

Not quite as effective as the 60% products but I haven't had any problems yet.

Excellent products and quality professional service

This worked so fast and my pool went from green to clear .

Been using it for at least 8 years and it works if you follow the directions.

Have used this product for several years and find it to be very good

Price was 75% lower than local pool store

Been using this for several years. Very cost efficient and only need a few ounces for treatment.

Always buy my chemicals fromSams