Hydrothol Granular Aquatic Herbicide & Algaecide 20 lb
- *Cannot ship to AK, CA, CT, DC, HI, MA, ME, NJ, NY, PR, RI, VT, WA. Usually Ships within 24 hours.
- Calculated at Checkout
Hydrothol Granular Algaecide and Herbicide
Hydrothol Granular acts as both an herbicide and algaecide, making it an excellent choice for pond owners. Hydrothol reacts quickly once applied to ponds with actively growing algae and weeds.
Treats up to 10,000 sq ft
Manages planktonic, filamentous, and branched algae ( green water algae, string algae, chara, nitella)
Curly Leaf Pondweed
Should NOT be used in ornamental ponds, or ponds with Koi or Goldfish.
How is Hydrothol applied?
Apply granular herbicide in areas with active weed/algae growth with a gloved hand or granular hand spreader.
Hydrothol Application Rates
|Treatment Area (with avg depth of 5')||Managing String Algae||Managing Chara & Nitella||Managing Submerged Weeds|
|1,000 sq ft||2 lb||4 lb||4 lb|
|10,000 sq ft||20 lb||40 lb||40 lb|
|40,000 sq ft||80 lb||160 lb||160 lb|
*See product label for additional dosage rates for ponds with flowing water
When is the best time to apply Hydrothol?
It is best to treat with Hydrothol early in the season when weeds/algae begin actively growing.
Cannot be shipped to AK, CA, CT, DC, DE, HI, MA, ME, NJ, NY, RI, VT, WA