Making Pond & LakeWeeds Disappear Since 1977

Lake Restoration


Are you Using the Correct Herbicide for your Pond or Lake?

June 10, 2015

What kind of weeds are in your pond? Duckweed, Watermeal, or Submerged Pond Weeds?  How about the weeds in your lake?  Curlyleaf, Milfoil, or Hydrilla? Let our experts help you get the right herbicide for the plant that you are trying to get rid of.

Duckweed is a very small floating green plant, usually smaller than your smallest fingernail.  Watermeal is an even smaller floating plant.  It is usually no larger than a pin head and it shows no visible roots.  Both duckweed and watermeal reproduce very rapidly.  If they are left untreated they can quickly take over a pond within a matter of a couple of weeks. 

If you have Duckweed or Submerged Weeds in your pond, we recommend using the herbicide Fluridone.   Not only will Fluridone control duckweed, it will also control nearly all submerged pondweed varieties.  This herbicide is great for treating an entire body of water and will stay suspended long in the water giving you more control over the plants that you want to get rid of.  We recommend getting the PONDRestore® kit that includes the Fluridone herbicide.  With a few simple steps you will easily control your floating and submerged weeds, get rid of the algae, reduce nutrients and restore your pond’s color to a beautiful deep blue.

Watermeal is generally a more difficult plant to control, and it often coexists with duckweed.  At times it is mistaken for seeds floating on the surface.  A great herbicide for controlling watermeal is Clipper.  Not only will it control your floating weeds, it also treats a variety of algae and submerged weeds.  When using Clipper we recommend applying it as early in the day as possible on a day with good sunlight.  Try to get as much coverage over the entire surface when applying this product.  To get the best overall health for your pond, we recommend using the PONDRestore® Watermeal kit.  This kit includes the Clipper herbicide and will also include Mizzen® Algaecide, Sapphire Bay® Blue Pond Dye and two Nutrient reducers to promote a healthy pond and clarify the water.

If you have lakefront and are only looking at controlling the plants that are located in a specific area such as a dock or swimming area, we recommend using a herbicide that is quickly absorbed by the plants or one that is available in a granular form.  This will give you the most control in the designated area.  Weeds such as Curlyleaf or Milfoil can be controlled with the herbicide Diquat.  Using Diquat in your dock area, you will quickly be able to control the weeds.  When the weeds are near the water’s surface you can simply spray the herbicide or you can even place the sprayer nozzle into the water to “inject” the mixture. 

If you are trying to control Hydrilla, Hydrothol Granular is a popular aquatic herbicide and algaecide that controls nearly all lake weeds and algae varieties.    It works best on firm, sandy lake bottoms and will improve your access to the water for recreation activities.  It can easily be applied with a scoop or broadcast spreader when the plants are actively growing.  It is most effective when applied on a calm day when the water temperature is 60°F or above.

Don’t let submerged weeds and algae take over your summer!  We recommend using the RestoreAccess®.  With this kit you will kill algae with Mizzen®, control submerged weeds with Diquat and even eliminate muck and sludge with Muck Maid®.  If you don’t want to spray the products, the kit is available in a granular form, RestoreAccess® “G”.  When using the “G” kit for effective weed management we recommend doing two applications, approximately four to six weeks apart.

Whether you are trying to control the plants in your pond or lake, we’ve brought together the most effective products to provide your pond or lake with relief from weeds and algae for the entire season.  We’ve tested and used all of the products that we are recommending.  If you are uncertain of what type of weed you have, send us a picture!  Our Plant Experts would be happy to identify which plants you have and give you the appropriate recommendation so you can get back to enjoying the water!


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