Hydrothol 191 Granular

Hydrothol 191 Granular

  • $124.99


Hydrothol 191 Granular Algaecide/Herbicide is a selective, rapid-acting, contact herbicide and algaecide. Controls submersed weeds and algae in lakes, ponds, irrigation canals, and drainage ditches. Works rapidly enough to be effective in both still and slow-moving water. 

  • EPA approved
  • Works quickly
  • Not swimming or fishing restrictions
  • Works on both Algae and Pondweeds!

Available in a 20-pound bag only. 

*Cannot be shipped to: AK, CA, CT, DC, DE, HI, MA, ME, NJ, NY, PR, RI, VT, WA 

Application Rate

 

For Algae Control  60 lbs treat up to 1 surface area 4 feet-deep
For Aquatic Weed control  120 lbs treat up to 1 surface area 4 feet-deep 

 

Direction for use:

To apply Hydrothol 191 Granular, simply broadcast the granules uniformly over the water surface above the target plant, by hand or with the use of a mechanical spreader.

              
Pro Tip:

Heavy algae or pondweed infestations should be treated in sections 5 to 7 days apart to avoid oxygen depletion from decomposing dead vegetation.

Water treated with Hydrothol 191 Granular should not be used for irrigation or human and animal consumption for 7 to 25 days depending on the application rate.

Please see label for complete product information. 

Can not be shipped to PR, HI, AK, or Canada

 Product SDS Sheet & Label

                                                                 

Hydrothol 191 Granular SDS Sheet                    Hydrothol 191 Granular Label

               

Recommended Application Rate: 

For Algae Control  60 lbs treat up to 1 surface area 4 feet-deep
For Aquatic Weed control  120 lbs treat up to 1 surface area 4 feet-deep 


Direction for use:

To apply Hydrothol 191 Granular, simply broadcast the granules uniformly over the water surface above the target plant, by hand or with the use of a mechanical spreader.

              
Pro Tip:

Heavy algae or pondweed infestations should be treated in sections 5 to 7 days apart to avoid oxygen depletion from decomposing dead vegetation.

Water treated with Hydrothol 191 Granular should not be used for irrigation or human and animal consumption for 7 to 25 days depending on the application rate.

Please see label for complete product information. 

Can not be shipped to PR, HI, AK, or Canada


Customer Reviews

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Customer Reviews
4.3 Based on 7 Reviews
5 ★
71% 
5
4 ★
14% 
1
3 ★
0% 
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2 ★
0% 
0
1 ★
14% 
1
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Filter Reviews:
DP
09/22/2022
Donavon P.
United States

So far so good

It’s been 7-8 days the weeds are turning brown I hope they sick to the bottom/disappear I gotta give it longer for an accurate review

EB
07/08/2021
Edward B.
United States United States

Easier than spraying

I have been using Hydrothol because of the convenience. It costs more than the spray algaecide but it's worth it to me. It does a great job clearing my pond algae.

JE
06/09/2021
Jerry E.
United States United States

I never know except when it starts working. It’s work right before let’s hope it does now

JJ
06/02/2021
Judith J.
United States United States

Hydrothol® 191 Granular

So far so good.

PA
04/26/2021
Peter A.
United States United States

repeat customer

I have used this product for many years with good results