Benthic barrier, Lake Bottom Blanket


Available in Canada, exclusively at!  The Lake Bottom Blanket is an easy-to-use aquatic tool for controlling invasive plants like the Eurasian Watermilfoil!

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$261.25 CAD
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Regular price
$261.25 CAD
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Instant aquatic weed control - a simple system that anyone can implement. The purchase of the Lake Bottom Blanket will help you regain control of your pond or lake in no time at all. The Lake Bottom Blanket is made in America and is available in several sizes for a variety of applications.

The principle is simple, here is how an aquatic cover works:

1- Identify the area where the aquatic weeds must be controlled

2- Install the Lake bottom Blanket barrier over the weeds

3- The Lake bottom blanket creates a barrier between the sun and the aquatic weeds and therefore kills them by the absence of sunlight

4- After 1 month you can either remove the barrier or move it to another location requiring weed control.

It's that simple! 

Video available: 


* Please note that this barrier is to control the growth of invasive aquatic plants and not to protect the feet from the bottom of the water *

Products often used in combination with the Lake Bottom Blanket

Bacterius Muck: Bacterius® MUCK is a concentrate of beneficial bacteria in pellets for the reduction of organic sediments. Ideal around docks, banks and shores with organic sludge. Click here

After one month, the lake bottom cover can be removed or moved to a new area where plants are a problem. For example, you can install the Lake Bottom Blanket around May and remove it at the end of June, and have little or no weeds in that area for the rest of the summer!

The Lake Bottom Blanket is shipped in a box without the necessary ballast frames. Ideally, 3/8" (10 mm) rebar should be used as the weight for the lake bottom blanket. 3/8" rebar is available at your local building supply store and most suppliers will cut it to your length. 3/8" rubber end caps are provided to cover the ends of the rebar to prevent damage or injury caused by possible sharp edges of the rebar.

Please note: Hardware stores or renovation centers typically carry ½" (13 mm) rebar; buying this is not recommended for normal use of the blanket. Only 4 caps are included in the package for this size of rebar.

This benthic barrier that acts like an aqua screen or burlap and can be removed annually as needed with minimal effort.  It is reusable for many years.

Weights and recommendations for reinforcing bars (REBAR)

Local purchase - 3/8'' (10 mm) rebars cut into 10-foot lengths

LBB20 (10 ′ x 20 ′) - Requires 5 bars

LBB30 (10 ′ x 30 ′) - Requires 7 bars

LBB40 (10 ′ x 40 ′) - Requires 9 bars

LBB50 (10 ′ x 50 ′) - Requires 11 bars

LBB80 (10 ′ x 80 ′) - Requires 17 bars

If your installation requires more weight, only the first and last tubes will accommodate ½ inch rebar and for this purpose 4 x ½ inch caps are included. All the other caps included in the box are the standard 3/8 inch for the 3/8 in rebar rods.

Warranty : 1 year coverage on manufacturing defects

Tech Sheet (PDF)

The Lake Bottom Blanket is easily installed in the water if the water weed beds are either in the dormant stage or at any time during the growing season, but it is easier to set up when it is installed before weeds emerge from the water surface. Blankets are 10 feet 9 inches (326 cm) wide regardless of the length required by the customer - normally 40 feet (12.2 m). Blankets are shipped folded without ballast. The float provided is designed to (A) keep boats that may disturb the blanket away and (B) locate the Lake Bottom Blanket's grab or travel handle.

The first step is to purchase the 10-foot lengths of 3/8 in (10 mm) rebar.

Remove the vinyl caps from the blanket package and place them on the ends of the rebar.

Unfold the blanket to its full width; you will see clips holding the plastic layers together; you will also see the ends of the tubes aligned side by side. One end of the tubes is sewn closed; find the open ends of the tubes; insert the rebar into the tubes. You will find a zipper on the open ends of each tube. Once the bar is fully inserted, lock it by tightening the tie onto the material; then cut off the free end of the tie.

Place the assembled pleated ribs on the stern of a boat with the plastic over the edge. Attach the two handling lines to the handles of the cover. The line for the end of the shoreline (indicated by the red tape) can be attached with a loop so that it can be easily detached after the blanket is deployed. Remove the clips.

The shoreline end must be attached to the outer rib, is attached to the shoreline or held by a person on shore.

The offshore line can be attached to the boat or held by an assistant.

Release the outermost rib into the water at the shore end of the intended installation. (The ideal water depth is at least 3 feet - the depth may be less if there is assurance that there is no activity in the coverage area). Move the boat away from the shoreline. Coverage will take place. It will probably take a few minutes for the entire blanket to settle below the surface of the water.

When the last shoreline is overboard in the water, using the line attached to the rope handle, pull the blanket reasonably tight before releasing the last shoreline at the bottom of the lake.

Attach the warning float to the line, positioning it so that it remains close to the edge of the blanket.
Once the blanket is installed, gently pull the blanket toward the shoreline, stretching the blanket reasonably tight again.
The shore side can be disconnected or attached to a shore support. Tying the rope to the shoreline is especially important when aggressive wave action is possible.
Note 1: In a deep water installation from shore, it is preferable to use two boats with two people on at least one of the boats.

Note 2: The intention is that the blanket should be deployed perpendicular to the shoreline - not parallel, as wave action can move or dislodge it and anyone walking in the water can trip over it.

Video available from the manufacturer.

Assembly : Video
Installation : Video
Removing the barrier: Video
Cleaning : Video

Installation and use (PDF)


Customer Reviews

Based on 5 reviews
Catherine Ross
10 by 30 ft benthic blanket

Delivered just as expected, all good, but no where in cottage country could we buy 10 ft. rebars. Apparently, Home Depot just got them in stock again, so we are going to rush up there . Will let you know how it goes.

michel boucher
Weed control

Good morning,

We've installed the tarp on the 12th. and won't be removing it till the 12th. of May as per your advice. So unable to let you know at this time if it is working or not. Please send me another email after the 12th. of May then I'll be able to give you an honest answer.

Mike Boucher
Chair of waterways

Good day Mr. Boucher,

Thank you for your review! Now that the Lake Bottom Blanket has been in the water for a few weeks, are you happy with the results?

thank you and have a great day!

Christine Bell
Lake Bottom Blanket, where have you been all my life?

I love this product. So easy to install and remove. My two sisters and I installed and removed in a matter of minutes.
Couldn't believe the results when we moved the blanket after a month, NOT ONE WEED!
Love Love Love it. Will be purchasing another one next year early.

Tom Bland

I returned the product as I was unhappy with the quality of the product when I opened the box. I have heard nothing back fro
m your company as of yet. This was over two weeks ago. I would like to know the status of my refund.

Good day Tom,
We are sorry that you did not like the quality of the product. It has been designed that way because this blanket is used to prevent sunlight to reach aquatic plants only. It cannot sealed the waterbed as it still needs to let gas, water, marine life to circulate around this blanket to minimize impact on the waterbody. Your return item has been received and process as per our email communication. Thank you for your interest in our products and we hope we will see you again soon!

Serge Roy
Lake bottom blanket

I bought a 10x20 lake bottom blanket last year to control invasive species in a part of my large pond and it was so effective that I decided to purchase a second blanket this spring. Highly recommended product!

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