Keep your garden pond looking its best by following these expert-recommended tips for removing algae.
A pond that is not well-maintained, unbalanced, orreceives too much sunlightcan lead to algae growing and thriving.
In this guide, experts share different ways to remove algae, including some preventative measures.
Credit:Gabriela Herman
Know Algae Types
Algae can encompass many types of protists.
Manually Remove
Removing algae by hand using a net is one way to get rid of this green growth.
This technique will be more manageable for a smaller pond.
Specialized rakes can be useful for larger ponds, says Braig.
Be careful when using a rake as it could harm or pull out other plants.
“Rakes will also remove vascular plants,” he says if you’re not careful.
Once you remove algae double-check to dispose of it properly or you could be inadvertently encouraging it to grow.
“If composted, the ratio of algae to other organic material likely shouldnt exceed 1:3.”
Minimize Photosynthesis
An effective and natural method is to limit the amount of sunlight algae receives.
Algae requires sufficient sunlight to grow and photosynthesize, just like plants in your garden.
“Plants compete with algae for the available nutrients,” says Green.
Her preferred method for algae control is using water lily leaves and other plants to block photosynthesis.
Install a Filter
Minimizing algae before it proliferates means less algae to remove.
“The larger the filter, the less often you have to maintain it,” says Green.
“Correctly sized filters need once-a-week maintenance.”
Increase Beneficial Competition
Algae have similar growing needs to plantssunlight, nutrients, and the right temperature.
Increasing the amount of plants in or near agarden pondcan reduce algae from growing.
If there is ample space and nutrients and not much competition, algae can proliferate.
Avoid Excess Nutrients
Too many nutrients can increase algae growing in the pond.
Nutrients can come in different forms, including over-fertilizing your garden or lawn or excrement from fish.
“Manage the landscape within the ponds watershed to minimize nutrient runoff,” says Braig.
Use Copper
Copper can be added to ponds to get rid of algae.
“Copper is effective and tends to be more affordable than other algaecide products,” says Braig.
It’s important to educate yourself before using any copper products as it could have negative consequences.
Know your water hardiness before using copper as it’s reactive to hard water, says Braig.
Using copper may not be the best choice if you have a garden pond with fish.
