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

Works well! We have intermittent algae problems in our little pond. I apply this a few times a summer and it clears it all right up! We have bass, bluegill, frogs, and a turtle in the pond - all of them seem fine and happy to not be swimming in algae soup! Used 2+ years now and very happy with the product.

Works well for our needs

Effective in preventing, controlling algae/it does discolor pond rocks to a green/blue color

Been using this for a three years, works great.

I purchased 2 gallons and used one according to the directions. No results. Tried to return the second gallon but it’s none returnable. I made a very bad purchase. 😩

This is a good product but was unhappy with the packaging of this product upon opening, the product had leaked. 3 stars due to packaging and leakage of product.

I put just a few ounces in my pond which is around 700 to 900 gals.. it cleared up the algae in 24 hours crystal clear now.. this is really concentrated ..

This stuff had a slight killing effect on the algae in my pond. But, it never completely dissolves and it makes a mess of your sprayer equipment. I went back to cutrine plus which has no solid particles, sprays easily and really kills the algae. I tried this product to save money but it was not worth it in any way. Save your money and buy cutrine plus.