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Started By
Message
Pond Algae Identification?
Posted on 3/8/21 at 1:22 pm
Posted on 3/8/21 at 1:22 pm
>>> LINK TO PHOTOS <<<
Hey H&G,
New pond owner here. Just dug last year, finally filled up in the winter. I have this algae bloom that recently popped up and I'm not sure how to deal with it. I tried Googling it but I can't find anything that quite matches. The closest I could find was Filamentous Algae.
Anyone know what this is? Should I treat it? If so, any recommendations as to with what?
For bonus points, I'll also take advice on the little bit of Duckweed you'll see in the photos, as well. :)
Thanks-
3
Posted on 3/8/21 at 1:31 pm to vemnox
quote:
I'll also take advice on the little bit of Duckweed
Get a rake and get it out.
Posted on 3/8/21 at 1:40 pm to vemnox
Spirogyra I believe
commonly called green algae
commonly called green algae
Posted on 3/8/21 at 2:28 pm to bbvdd
Yep, I am fighting the same issue with my pond.
Posted on 3/8/21 at 3:28 pm to vemnox
quote:
I'll also take advice on the little bit of Duckweed you'll see in the photos, as well. :)
Nuclear bomb? That MIGHT not kill it all. You leave one half of a leaf of duckweed in the pond and it will take over. Peak summer it is said 1 plant can cover an acre in 2 weeks... I don't know how true it is but it does grow insanely fast. Good news is that the duckweed will outcompete that other algae for nutrients and will knock it down pretty much to nothing.
Posted on 3/8/21 at 4:35 pm to bbvdd
quote:
Spirogyra I believe commonly called green algae
Correct answer Spirogyra is a cool water algae. Slimy to the touch. Grows at the bottom and floats to the surface this time of the year (gas vacuoles are trapped in the mass of algae). Bright sunlight will kill it (photoxidaion) so it will turn brown and die on its own without chemical treatment. A similar looking algae, Pithorphora, would be course to the touch like steel wool.
Duckweed - treatment with diquat labeled for use in aquatic environments in a non-muddy pond. Common brand is “Reward” but there are cheaper generic versions. P.S. not sure if that is duckweed - photo is a little washed out , any better closeup photo what what you think is duckweed?
Learn more at this site Aquaplant
This post was edited on 3/9/21 at 1:30 pm
Posted on 3/8/21 at 8:36 pm to CrawDude
Sonar is only chemical that will truly control duckweed. It’s expensive but works. You can spray rodeo (roundup for water) or diquat and it will kill it but as others said if u leave a fraction of a piece your back to square one. Sonar is put in water and prevents duckweed from absorbing sunlight and will die off.
I end up having to treat mine every year and birds continuously bro g it back in.
Check out pondboss.com, endless amounts of info that helped me tremendously when I bought my house and had to learn the ropes.
I end up having to treat mine every year and birds continuously bro g it back in.
Check out pondboss.com, endless amounts of info that helped me tremendously when I bought my house and had to learn the ropes.
This post was edited on 3/8/21 at 8:43 pm
Posted on 3/9/21 at 7:33 am to Tbooux
Fluridone (Sonar) is an excellent systemic broad spectrum aquatic herbicide - there are cheaper generic versions (e.g., Avast) - that has excellent control on duckweed and other aquatic weeds.
As with any weed, particularly aquatic weeds where herbicides labeled for aquatic use are considerably more expensive than their terrestrial counterparts, it is important that the aquatic weed be correctly ID’d first before shelling out $.
In my experience most residential pond owners will choose diquat (contact herbicide) for minor issues with duckweed control once they see the cost of fluridone - usually depends on the severity of the weed issue, size of pond, frustration of the pond owner with re-occurring weed issues, and of course one’s budget.
As with any weed, particularly aquatic weeds where herbicides labeled for aquatic use are considerably more expensive than their terrestrial counterparts, it is important that the aquatic weed be correctly ID’d first before shelling out $.
In my experience most residential pond owners will choose diquat (contact herbicide) for minor issues with duckweed control once they see the cost of fluridone - usually depends on the severity of the weed issue, size of pond, frustration of the pond owner with re-occurring weed issues, and of course one’s budget.
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