Making Pond & LakeWeeds Disappear Since 1977

Lake Restoration


Hydrothol 191

Hydrothol 191

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Hydrothol 191 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

The RestoreAccess Ultra G kit includes granular Hydrothol 191 and MUCKMAID. Hydrothol 191 to control submerged weeds and MUCKMAID to consume nutrients and silt that help aquatic weeds grow.

For a more complete solution, we recommend a pond weed control kit such as PONDRestore Ultra or PONDRestore. 

Hydrothol 191 should be spread evenly throughout treatment area when plants are present. Most effective when applied on a calm day. When applying Hydrothol 191 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.

If your order total is: Shipping is:
$0 to $50 $9
$50 to $150 $12
$150 to $250 $15
$250 to $500 $19
Over $500 $29

Orders are usually shipped within one day by UPS Ground.

US Shipping Only. International Shipping available for Goose D-Fence and Lakemaid.

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


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