How to Prevent and Eliminate Pond Algae

Most people prefer a hot summer that's full of sunshine, but your pond certainly doesn't and is liable to become clogged by green algae. Why should you be bothered and what can you do about it?

Created by Andy Hobson (Alumni) on Thursday, 14th of August, 2014.


NULL

The reason why algae needs to be eliminated is twofold, yes it is unsightly but perhaps more important, it has a detrimental effect on any pond life.

There are many types of algae, including blanket weed, that turns a pond into something resembling pea soup. The core of the problem is that whatever the type, algae deoxygenates the water, hence the need to eradicate it.

What causes pond algae?

Too much sunlight is a major reason, particularly during the summer if the water is too shallow. 

The other most important factor is poor filtration that leads to high nutrient levels in the water. This can result from decaying matter, rain leaching garden fertilizer into the water or the detritus from too many fish.

How can you prevent algae?

Position the pond away from trees and, especially in the autumn, use netting to prevent leaves falling into the water. Also make sure that dying foliage of aquatic plants is collected to stop it decaying at the bottom of the pond.

Ensure that the pond receives some shade during the day. If like me you have a south facing garden this can be difficult but it's really important and one way to achieve it is having surface plants such as lilies cover 50% of the water

The water should be at least 2ft deep, ideally 4ft if you are keeping fish and ensure that the pond is not overstocked with fish. Avoid the water becoming stagnant by installing a water feature that will aerate the pond.

Only introduce plants that are growing in low nutrient aquatic compost and when topping up a pond use rainwater from a butt rather than tap water.

Regularly use a pond test kit to discover the water's pH and levels of ammonia, nitrate, nitrite, chlorine. By detecting any problems you can take remedial action and return the pond to the balance that's best for aquatic life to flourish.

Adequate filtration is essential to prevent the build-up of nutrients. There is a wide range of pond filtration equipment, some with integral UV clarifiers that eradicate algae, leaving the filter to remove other debris. Pond UV clarifiers can also be bought separately. 

Eliminating algae from a pond

Do not be tempted to replace the water, the chlorine and other substances in tap water will only make the problem worse in the long term.

If algae has already taken a hold on the pond remove as much as you can with a stick or net and then use a specialist pond treatment that will either kill the algae or remove the nutrients that the algae feeds on. Barley straw can also be effective, for a small pond use it in lquid or pellet form.

Once under control, put into place the algae prevention advice and then regulalry test the water as you may well need to treat it on several occasions. With regular attention the pond should remain in perfect condition for you to admire and for your wildlife to thrive in.

Related Articles

What To Do In The Garden In August

What To Do In The Garden In August

After the recent spell of hot weather, David Coton was glad to see the recent rain freshening up the Garden Centre and he has these suggestions for some of the jobs that need to be done during August.

Author: David Coton

Written by David Coton.
Published on Thursday, 27th of July, 2017.

Reasons To Choose An Intalogs or Blagdon Raised Pond

Reasons To Choose An Intalogs or Blagdon Raised Pond

There's no doubt that building a pre-formed or liner pond involves a certain amount of hard work, so Nathan James Dodd thinks that a raised version from Intalogs or a Blagdon is well worth considering.

Author: Nathan James Dodd

Written by Nathan James Dodd.
Published on Thursday, 12th of May, 2016.

How To Transform Your Pond With Plants

How To Transform Your Pond With Plants

A pond is an essential part of the garden landscape, and plants transform their appearance as well as ensuring a healthy aquatic environment. Dan Everton, our Aquatics Supervisor, shares his thoughts on the best plants to use.

Author: Dan Everton

Written by Dan Everton.
Published on Wednesday, 11th of May, 2016.

How To Prevent Your Pond From Freezing

How To Prevent Your Pond From Freezing

Although winter may be coming to an end, freezing temperatures are still predicted and Dan Everton from our Aquatics Superstore recommends using ice prevention products to safeguard your pond.

Author: Dan Everton

Written by Dan Everton.
Published on Monday, 22nd of February, 2016.

comments powered by Disqus

RSS

View RSS Feed

Author

Andy Hobson (Alumni)

former Social Media Co-ordinator

View Profile

Follow Us!

Recent Articles

Grange Launch Their New Products For 2018

Grange Launch Their New Products For 2018

David Coton was recently invited to the exclusive launch of Grange's new products for 2018, the result of significant investment that the garden structures and fencing firm have received from their Polish parent company.

Author: David Coton

Written by David Coton.
Published on Monday, 30th of October, 2017.

What To Do In The Garden In November

What To Do In The Garden In November

David Coton suggests that there are plenty of gardening jobs that need to be done in November, from why you shouldn't throw away your fallen leaves to how to take care of your vegetable patch.

Author: David Coton

Written by David Coton.
Published on Friday, 27th of October, 2017.

What To Do In The Garden In October

What To Do In The Garden In October

In October, David Coton is getting the garden prepared for the onset of colder weather but, at the same time, the arrival of spring bulbs in the garden centre is a reminder that you should also now be planning ahead for next year.

Author: David Coton

Written by David Coton.
Published on Monday, 2nd of October, 2017.

VegTrug - The Easy Way To Grow Your Own Vegetables

VegTrug - The Easy Way To Grow Your Own Vegetables

At GLEE this year David Coton visited the VegTrug stand to find out how their specially designed space saving planters can encourage us to grow more of our own food without the use of pesticides.

Author: David Coton

Written by David Coton.
Published on Thursday, 14th of September, 2017.