Aquatic Herbicide Application Timing: Q&A

Algae Control AquaClear Pellets aquatic herbicides glyphosate Lake Muck

Man Spraying Aquatic Herbicides

“It has been over 1 week since I sprayed…There is absolutely no weeds and algae floating around! Thank you for the direction on this.”

S., Edinburgh, IN

Question two in the Q+A Series is recent correspondence from a customer that initially wanted to remove dead weeds and “muck” on the bottom.  Beneficial pond bacteria is an excellent option. Along with the “muck” the same customer wants to control Water Willow and Algae.

Question #2- Can we spray those aquatic weeds now or wait until we get our coldest weather and hope that they die down, then spray as they begin to come back?

Most liquid aquatic herbicides and algaecides are best-applied early spring and summer when lake weeds and algae begin actively growing.  Application should be made when water temperature is 55 to 60 degrees or above. If applied prior to growth or in water temperatures below 55 degrees overall effectiveness may be reduced. 

Glyphosate is a second option best-applied mid to late season when lake weeds are above the water surface and in full bloom.  Unlike other liquid options, this must be sprayed directly onto the exposed foliage not into the water.

Early season control is will reduce the amount of additional decay and “muck” buildup and also allow more time to this summer to enjoy your recreational area.

Read what our customers have to say about our products:


Review for Shore-Klear Liquid

“This product works great in my pond. I have a small 1/2 acre pond and use this every year. Keeps the water clean and removes most of the smell from the bottom muck. I highly recommend this product".


Next Steps:

To visit our online store click here

To Request our product catalog click here

To learn about lake weed analysis click here

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