Crystal Plex - Lake and Pond Algaecide Treatment - Liquid Copper Algaecide Kills and Prevents Various Types of Algae (Planktonic, Filamentous, Chara) - 1 Gallon Treats up to 1 Acre

We have about a 1/4 acre pond that turned into pea soup as summer dragged on. It was 80% covered with planktonic algae right below the surface of the water. Together with some black dye and this we’ve pretty much knocked out the algae. I used a power sprayer to treat the pond and over the course of 48-72 hours the algae was gone. I’ll treat again in 14 days to keep it at bay. This product worked great for us.

This did seem to help with the growth and did not harm the frog or fish population.

Applied the entire gallon using a sprayer and results are minimal. To get serious results, it looks like I would have to apply at least 25 gallons based on what effect the 1 gallon had. And that would be a really poor value for the money!Some of the worst and contradictory instructions I've ever seen. It says you can put this product directly into the pond and it also says dilute 1 gallon to 10 gallons of water and it also says apply so many oz's per 1000 sq ft. If I didn't need this stuff right now, I'd send it back. Going to spray it undiluted directly onto the algae and see what happens.

I have had great success with both Crystal Plex and Crystal Blue. I am giving only 4 stars because after looking like a successful application of Crystal Plex, two days later I had to apply another gallon dose because the algae reappeared just about immediately. I had also applied a dose two weeks before. I have never had a problem before and have used it successfully for several years. I am hoping this last dose does the trick. I am attributing the reappearance of the algae to the unusual weather this summer. It has been hotter than normal, and except for early spring, we have had no rain. My overall experience with these products has been remarkable.I am certain I will be able to give it 5 stars next time around. The two gallons I just received are for future use.The pond I use it in is a swimming pond for the grand and great grand children( and this year the older adults

Excellent product

Works ok....but still lots of mug not clear

This will kill algae in a pond. Use it when you see the 1st signs of floating algae to get it under control. ! gal. did 1 surface acre of my pond well.

Bought this to use on our pond at our new property. Used per instructions and the pond looks the exact same..if not worse.