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ECOS Preventative Aquatic Weed Control

ECOS - Early Control Optimized Sonar Performance

ECOS Preventive Aquatic Weed Control is a Sonar-powered prescription designed to optimize performance and provide season-long, broad spectrum weed control in ponds and small lakes. This pre-emergence use of Sonar optimizes efficacy by treating plants as they emerge from the hydro-soil and have low energy reserves, making them susceptible at lower use rates and providing more rapid control. Timing of this pre-emergence use is based upon regional location and local growing zone and growing degree day influence on aquatic plant growth.

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SePRO’s ECOS program is simple to implement and will provide excellent control season-long for submersed aquatic weeds. ECOS is guaranteed* by SePRO, providing you a time & frustration-saving solution for submersed weed control.

Don't wait for the problem to show

Reactive treatments don’t normally start until the weeds are visible and by then you are already behind.

  • Mature weeds are more difficult to control
  • More product could be needed for larger plants
  • It takes more time for mature weeds to die off and decompose
  • Reactive treatments could take more time and money in the long run
Be proactive with ECOS

Proactive treatments allow you to stay ahead of unsightly submersed weeds.

  • Younger weeds are easier to control
  • Treating early can use less Chemicals
  • No topped out weeds when you suppress weed growth early
  • Save time with only two applications*
  • Increase your odds of having open water this year

Step 1: Weed Identification

Do you have any of these submersed weeds in your pond?

American PondweedAmerican Pondweed
Has oval shaped leaves that spread across the water surface.
BladderwortBladderwort
Stems with lacy, complex leaves. Flowers above water.
Brazilian ElodeaBrazilian Elodea
Multi-branched stems that are slightly brittle.
Clasping-Leaf PondweedClasping Leaf Pondweed
Upper part of the stem has alternately arranged leaves.
CoontailCoontail
Easily identified by its "raccoon tail" cluster of leaves.
Curly Leaf PondweedCurly Leaf Pondweed
Leaves are somewhat stiff and crinkled, resembling lasagna noodles.
ElodeaElodea
Multi-branched stems that are slightly brittle.
Eurasian WatermilfoilEurasian Watermilfoil
Feather-like leaves that sometimes produce reddish flowers.
Floating-Leaf PondweedFloating-Leaf Pondweed
Floating, heart-shaped leaves.
Horned PondweedHorned Pondweed
Long, linear, thread-like leaves.
HydrillaHydrilla
Submersed plant with long, branching stems that can fragment.
NaiadsNaiads
Long stems with many branches and narrow leaves.
Sago PondweedSago Pondweed
No floating leaves and thin stems.
Small PondweedSmall Pondweed
Several lateral branches attached to a slender stem.

Step 2: Measurement

How big is your pond?

Calculate Rectangular Pond Size:

Enter Pond Length (ft)
Enter Pond Width (ft):
Enter Pond Depth (ft):



Acres (surface area):
Acre-Feet (volume):
Rectangular Pond Measurements

Calculate Circular Pond Size:

Enter Shoreline Length (ft):
Enter Pond Depth (ft):



Acres (surface area):
Acre-Feet (volume):

Circular Pond Measurements

Step 3: Timing

What state is your pond in? What time of year is it?

ECOS Application Timing Table

Step 4: Select Your ECOS Program

The next step is simple. If you have a submersed weed on the list and are within your region's start time, select the appropriately sized ECOS program below.

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ECOS Preventative Aquatic Weed Control

Program sizes available for ponds 1/8 acre to 1 acre.
From $84.99