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> Hydrothol® Granular

Hydrothol® Granular

Hydrothol 191
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Granular aquatic herbicide and algaecide for lakes only.
Just $118 for 20 pounds!
Price: $118.00 (USD)
HYDROTHOL20

Hydrothol® Granular is a granular aquatic herbicide and algaecide for lakes and controls nearly all types of lake weeds, including milfoil and hydrilla.

  • EPA Approved
  • No swimming or fishing restrictions
  • Works best on firm, sandy lake bottoms


We recommend using Hydrothol® Granular and MuckMaid®. Hydrothol® Granular will control submerged weeds and MuckMaid® will consume nutrients and silt that help aquatic weeds grow.

Hydrothol® Granular should be spread evenly throughout treatment area when plants are present. Most effective when applied on a calm day. When applying Hydrothol® Granular aquatic herbicide, we recommend using a broadcasting spreader.

Hydrothol® provides control where you need it, in the application area, not away from the target area. For this reason, Hydrothol® is a valuable tool in improving access to the water for recreational activities such as swimming, fishing, and water skiing. Hydrothol® is effective in muddy or murky water because it does not bind to the suspended sediment or organic matter. Hydrothol® is also an effective algaecide.

Types of Weeds Controlled:
Milfoil
Hydrilla
Submerged Weeds

Read all product labels for complete instructions before applying products.

Shipping Information:

FREE Shipping on Orders $99+
Orders that are $98.99 or less will be charged $8.95.

Orders are usually shipped within one day by a ground carrier.

US Shipping Only. International Shipping available for the TORMADA®, Goose D-Fence®, LAKEMAID® and select products.

Certain regulations apply for shipping to AK, AZ, CA, CT, HI, MA, ME, NJ, NY, VT and WA. Please contact us if you live in one of these states: 1-877-428-8898

Combine Your Purchase With
RestoreAccess Ultra G
Granular Dock & Swim Area Products
$195.00 (USD)
Broadcasting Spreader
Broadcasting Spreader
$29.00 (USD)
MuckMaid®
MuckMaid®
$28.00 (USD)
Mizzen
Mizzen
$16.95 (USD)
Customer Reviews
(4.05)
# of Ratings: 22
Click Here to rate this product
1. on 6/9/2021, said:
My experience is similar to the June 8, 2021 reviewer. We purchased in may 2020. At that time the website stated: Water use restrictions— Swimming zero days Fishing. Zero days Drinking water. Zero days When the product arrived it openly states it can kill fish & should not be used within 500’ of your water intake. Jenni Oxley was extremely slow to reply & did so only after I sent multiple emails. She was rude & said she had no control of the website information. Her comment was that I should have read the labels available in the website. Since the website said the water was drinkable at zero days, silly me did not think it necessary to read the labels. Her suggestion was that I return it at my expense which did not seem fair to me. They have removed drinking water from the website but I do have a screenshot with the 2020 water use restriction. Very disappointing experience.
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(3 people found this comment helpful, 0 did not)
2. on 6/8/2021, said:
Last year the product worked great so we purchased 40 lb this year and we have very poor results .I have email the company a number of times with no response. Not good would someone please contact us or respond to the emails thank you m weide
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(2 people found this comment helpful, 0 did not)
3. on 5/11/2021, said:
0my God this product trained me to kill reeves trees.
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(1 people found this comment helpful, 0 did not)
4. on 9/19/2019, said:
This stuff is AWESOME. I NEVER leave reviews on something unless it is a complete bust or amazing and this is definitely amazing. We have a 15 acre lake on our property in Central Texas and the hydrilla was awful. We used this stuff and it is the first time I could swim off the boat ramp, out to the middle without touch the hydrilla!! Will be buying more next year!
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(6 people found this comment helpful, 0 did not)
5. on 7/29/2019, said:
Easy to apply, I've been using this product for about 10 years. Apply once in the late spring, and its good for all year.
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(4 people found this comment helpful, 0 did not)
6. on 7/24/2019, said:
Excellent product for controlling weeds along the shoreline.
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(2 people found this comment helpful, 2 did not)
7. on 7/18/2019, said:
Product worked great. Much better than I expected. We will be ordering every year. Thank you
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(2 people found this comment helpful, 1 did not)
8. on 7/17/2019, said:
Works within two weeks in my pond.
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(3 people found this comment helpful, 0 did not)
9. on 7/17/2019, said:
I like the price compared to other brands and it works just as good! Seeing less weeds this year, second year of using it and i will continue to purchase it if price doesn’t go up. I’d like to see if there is something that treats the “crab grass” type of weed, it gets brown but we go in and have to rake it out and the roots are deep! Leaves a big whole when it comes out finally.
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10. on 7/17/2019, said:
First of all, Shipping is outstanding! I ordered on a Sunday and received product on Tuesday. Only 2 days, unheard of. I like the product, works pretty fast, will have to treat one more time pretty soon.
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(3 people found this comment helpful, 0 did not)
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