Crystal Blue Copper Sulfate
Customer Reviews

Rating Snapshot

5 of 5 stars (8)
5 out of 5 stars
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32 of 33 people found this review helpful:

crystal blue copper sulfate
5 of 5 stars
By Barbara in daytona beach, florida on 10/12/2012

I have had pools all of my adult life. and when i live in the north keeping the pool alge free was easy but now i live in Florida were the long hot days make alge a big problem. after spending hundred…

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26 of 30 people found this review helpful:

Great Product!
5 of 5 stars
By Anonymous in Louisville, KY on 07/11/2013

Crystal Blue removed the algae from our pond in just days. It was very easy to use. I just used it dry by broadcasting it across sections of the pond. I did about half of the pond the first week and t…

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13 of 14 people found this review helpful:

Crystal Blue Copper Sulfate Granular
5 of 5 stars
By Stuart in Franklin, Alabama on 07/24/2016

In our experience this is the only product to use to rid ponds of filamentous algae. We found that how you apply the product is very important. We have a 3 acre pond that we let the algae get away fro…

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9 of 10 people found this review helpful:

got it done
5 of 5 stars
By Frank in Star Mississippi on 04/07/2015

I had a litte moss forming in the edge of my pond this stuff works great i dissolved some of the crystal in my sprayer sprayed it on top in one day started turning dark three days it was gone

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6 of 7 people found this review helpful:

One and Done
5 of 5 stars
By Randy in Adel, Iowa on 05/25/2018

This stuff is like napalm on moss. Sprinkle some on top the moss mat, then watch it turn brown and then sink away. A remarkable produce.

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4 of 4 people found this review helpful:

Blue crystal
5 of 5 stars
By Jon in Celina oh on 05/29/2020

Worked great. Hand sprinkled over all the algae and within a day n a half it was transparent. I will buy again.

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2 of 3 people found this review helpful:

copper sulfate
5 of 5 stars
By Tom in ga' on 06/19/2020

this stuff is great' just want to thank your company very much 'Have a great and bless day'

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1 of 2 people found this review helpful:

Artifical Waterfall Algae Control
5 of 5 stars
By Kevin in Peoria, AZ on 10/31/2016

This product stopped a minor algae bloom in my decorative waterfall and keeps the problem under control. My waterfall and pond gets a lot of sun (Arizona) and algae growth can be a problem. Not any mo…

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