Crystal Blue Copper Sulfate Algaecide - Granular Aquatic Grade Copper Sulfate for Pond Algae Control - 5 Pounds

Worked really well. We had horrible, thick algae across our pond. This product cleared it up within weeks, after only 4 applications.

A spray of this works perfectly in destroying any algea from our pond.

Kills Algae quickly

I had purchased a container that looked like the picture a year ago. When shopping to replace it, I bought this one thinking it was the same. But it’s my fault for not reading that I was buying 5lbs. It’s still a good product but I think it’s deceiving.

this stuff is the way to go in the pool

It is exactly what you need for your ponds

Don’t have instructions how much to use I have used this before it is good for cleaning your pool but I don’t thank you get your money worth but it is a good product

I have a very small cattle tank that is a dug out for dirt work needed. Probably less than 300 sq ft and 5 feet deep max. I had filamentous algae. Cast about 3 tablespoons in on top of water/algae in morning. By evening after a 90 degree day, half of the stuff which covered 90% of pond was gone. The next morning it was all gone. It did not bother my fish, sheep, cows, pigs, fowl after confirming use after 4 days. Couldn't believe the results. It worked great for me with no problems. I had concerns about the sheep bc high copper is toxic. No problems.