Copper Sulfate Pentahydrate - 25.2% Cu - 1 Pound - Easy to Dissolve - Powder

I use it to kill the roots in my sewer line !!! Works great !!!

I've had toe nail fungus for 25 years and tried everything - prescription, over the counter and home remedy. Nothing worked. I used this product for 10 days a year ago and it totally killed the fungus, all gone. Toenails have now have grown out healthy and fungus free.

I had read about the wonders of Copper as an anti-algae agent, did a little research and figured for the price I couldn’t fail.This stuff is amazing, I had zero algae bloom, didn’t even have issues near/under my stairs which are annually horrible.Reduced my Chlorine requirements.(probably by 20% or more, I didn’t want to mess up balances so I didn’t reduce it any more than 20%)The water “sparkled”(I keep a clean pool, this was epic).And the pound of product will likely last me 5 or more years.

I ordered Dec. 16th with an estimated delivery of Dec. 31st. Imagine my surprise when it arrived on the 22nd!I ordered this product to mix for use in making a paste that is effective in treating thrush, a common bacterial/fungal infection common in horse’s hooves. I’ve heard it works really well and I’m looking forward to using it. This 5lb. Bag should last for a year or so easily. I’ve read alternative uses for this as well that I may try around the house/farm. Overall, I’m really pleased with this product.

Buen producto

I used this to treat for black mold behind baseboards. (Don't use it anywhere visible, because it turns everything blue.) It can be added to sprays (7%?) for fruit trees and garden plants to treat and prevent plant fungus.It also works to kill toenail fungus if you soak your toes daily for a few weeks to a few months. Unfortunately, it turns your toenails a bit blue green (unevenly), but that doesn't matter to me because I never wear sandals or flip flops. The blue green doesn't fade very fast, but it eventually grows out over several months after you stop the treatments. For women, nail polish would probably cover it just fine.

Third time purchasing this. Works great.

This is a re-order, so obviously, I was satisfied.I used it to make Bordeaux (which cannot be purchased without a license anymore). After preparing stock solutions of lime and of this product, I strained and mixed the field-strength spray. A gel-like substance precipitated out and clogged my spray; I had to clean it a couple of times, then it was ok. Next time, I will decant the copper solution through the strainer. I don't know how that will work; some suggest that the precipitate forms from reaction with H2S in the water. Who knows. Still, I am very happy to use this product 30 days after oil to diminish disease on my grapes before budding out. (Please be careful in the use of this spray--I wear rubber boots, rainsuit with hood, respirator, full face shield, and gloves.)