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🌊 Clear waters, confident control — because your aquatic spaces deserve the best.
Hydrothol Aquatic Herbicide 20# Bag delivers 11.2% Endothall in a granular form designed for effective, targeted control of aquatic weeds and algae. Trusted for over three decades, it offers fast action in diverse water conditions without harming fish or accumulating in the environment. Perfect for professional and qualified applicators aiming to restore and maintain healthy, recreational water bodies.
| ASIN | B00QXNR7AE |
| Active Ingredients | Herbicide |
| Best Sellers Rank | #27,182 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #85 in Water Garden & Pond Treatment |
| Brand | United Phosphorus Inc |
| Brand Name | United Phosphorus Inc |
| Coverage | 1000 square feet |
| Customer Reviews | 4.1 out of 5 stars 481 Reviews |
| Global Trade Identification Number | 39270356680801 |
| Item Form | Granule |
| Item Weight | 20 pounds |
| Liquid Volume | 9463.52 ml |
| Manufacturer | United Phosphorus Inc |
| Number of Packs | 1 |
| Part Number | 6020396 |
| Unit Count | 320 Ounce |
R**W
Handling Invasive Aquatic Species
The product works as intended. It is extremely important to follow instructions and receive authorization for use from State Authorities before using.
A**R
Lowest price
Arrived fast, in a box, lowest price
J**R
Works well on curly leaf pondweed
Seems to work on curly leaf pondweed -- especially when treated early enough (about 50F water temp).
C**N
Weeds gone
Why did you pick this product vs others?: Works great on lake weeds. Unfortunately expensive and takes a full bag to do the job.
M**E
Dont waste your money on this!
DO NOT WASTE that much money on this! Ended up having to clear my area by hand weeks later due to VERY little results from this product !
A**N
Pond Problem Solver
Cleared out stubborn algae in just a few days. Easy to spread and works fast without harming the fish.
L**A
Very effective on seaweed
This product is fabulous. The seaweed that was at my shoreline is almost gone after one week of application. I thought I would have to pull out by hand the treated seaweed upon it turning brown. We have a bit of a current in my channel that is just washed away. I thought the pricing is quite reasonable, my neighbors have spent far more than I on their products to rid the seaweed.
K**R
If a large area, will need more than 1 bag
I wasn't expecting to have the product look like "kity liter". Small and granular. I was surprised by this, but may be my fault by not reading the description in full. I found that because of the texture of the product that it was really hard to get the correct amount on the weeds. It did kill SOME of the weeds. I'm sure if you were to take a handfull and actually poor it on certain areas, it would be pretty effective. We just didn't think it killed the weeds as we thought. We did the product quickly.
Trustpilot
1 week ago
1 month ago