Algae & Weed Control

Filamentous Algae Planktonic Algae Chara Algae
Cattail Pond Weeds Sago Weed Clasping Leaf
Curly Leaf Large Leaf Pond Weed Elodea
Duckweed Watermeal Water Lillies
Eurasion Milfoil Coontail Naiad
Hydrilla Parrot Feather Water Hyacinth

Pond Algae
(3 Common Types)

Filamentous algae is most common, growing in mats and strings.

Planktonic algae causes green water, it has millions of cells that cloud together.

Chara algae is weed-like, it grows like a carpet along the bottom.

Cattails & Other Emergent Plants - Emergent plants grow around the perimeter of a pond in shallow water with all or most of their foliage above water. Examples are Cattails, Bulrush, Reeds, Purple Loose Strife, Pennywart and Pickeralwood.

Pondweeds - The pondweed family has over a dozen varieties with these four being the most common: Sago, Clasping Leaf, Curly Leaf, Large Leaf.

Elodea - This plant grows in thick clumps and is usually not a big problem, the leaves are in whorls of three around the stem.

Duckweed & Watermeal - Duckweed is hard to control, it forms a thin layer over the surface in calm ponds. It will not grow well in moving water so use of a surface aerator will help in controlling growth.

Waterlilies - Waterlilies can become a problem in many ponds, they grow off of a large central root system (much like popal trees). Some growth is great for shade and cover for fish, but when left unchecked they will overpopulate quickly.

Eurasian Milfoil - Spreads very easy since fragments of plant can re-root and grow. Do not try to remove by raking.

Other Less Common Weeds: Include Naiad, Coontail, Bladderwort, Hyrdilla, Parrot Feather & Water Hyacinth.

The following chart shows which treatments work best for Algae
E = Excellent Control    G = Good Control

For larger chart click here
Chemicals All Types Algae Emergents & Cattails Water Lilies Duckweed Elodea Pondweed Family Naiads Milfoil Coontail Bladder Wort Hyrdilla Parrot Feather Water Hyacinth
Cutrine Plus E G
K-Tea G
Sonar G E G G G E G G G E
Komeen E G G G
Super K
Hydrothol G G E E G G G
Navigate E E E G G G
Weedtrine-D G G G G G G G G
Reward G G G G G G G G G G E
Clipper E E E E E E
Nautique E E E E E E E
Renovate E E E

Many states restrict the shipment of EPA registered chemicals into the state. At this time most products that are not EPA registered are not restricted. Please look next to each product to see if it is EPA registered. If it is, please consult the information below to see if it can be shipped into your state:
AK, CA, CT, ID, HI, ME, MA, NH, NJ, NY, RI, VT & WA restrict the shipment of products into their states. Products can be bought from within the state but not shipped in.
No products can be shipped into Canada. Canadian law requires different labeling and registration. US labeled chemicals cannot ship into Canada.
GreenClean (GC20, GC50) can be purchased in NY but you must obtain a permit to apply in that state, all other states ok. GreenClean Pro (GC50PRO) and GreenClean Liquid (GCL5) are restricted in MA. The states of NY, NJ, VT and ME can buy GreenClean Liquid (GCL5) but must obtain a license to apply in that state.

Product Reviews

Questions & Answers

3 Questions & 3 Answers
Jim Kingen
from Varna, IL asked:
May 9, 2017
Do you have any manual weed cutters that can be dragged along the bottom or cast out and dragged back to shore from the bank?
1 Answers
Customer Service
on June 16, 2017

from Boston Ma. asked:
May 3, 2017
Our pond is approx. 100 ft. by 200 ft. and 4ft. deep. We have a thick green slime that floats on top and in the water and coats the basket on our pump. We have the J F 3400 Fountain. How can we treat it?
1 Answers
I would recommend green clean, it is a very popular product because it works great and is more environmentally friendly than the copper sulfate based algaecides.
Customer Service
on August 8, 2017

ron Sinderud
from Santa Ysabel, Ca. 92070 asked:
April 27, 2017
Pond full is 4.8 acres, will go down some through summer. deepest is about 20' but on average probably 8'. to 10'. Cabin on pond has a propane generator. Does the aerator need to run 24/7 to be effective. Or how many hours to run 24/7 to be effective.
1 Answers
The optimal recommendation for aeration is to run it 24/7. However, because of concerns about the cost of electricity we have had customers who put the aerators on a timer. If you did do that we would recommend no less than 12 hours per day. If you do 12 hour cycles the best time to run them is during the evening hours. You should have no problem running 12 hours a day for most of the year, but you may want to consider 24 hour operation during the hot summer months.
Customer Service
on May 1, 2017


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