How To Choose A Pond Filter

All ponds need a filtration system to keep the water clean, clear and healthy. As Dan Everton points out, stocking levels of fish are much higher in a garden pond than in the wild and, without a filter, impurities accumulate to create a toxic environment.

Created by Dan Everton on Wednesday, 26th of August, 2015.
Updated on Monday, 21st of December, 2015.


Mechanical and biological filters, together with UV clarifiers, will cleanse the water to create the best possible environment to encourage a thriving population of fish and plant life.

Mechanical Filters

  • Dirty water flows through the filter, foam or other media that captures debris. Filtered clean water then returns to the pond.

Biological Filters

  • This process involves a filter medium that contains beneficial bacteria that cleanse the water.

UV clarifiers

  • These are included in many filtration kits and available separately with the UV helping to eradicate 'green water' by eliminating algae.


For ponds up to 10,000 litres, box filters are the best choice, they may contain a clarifier and can be biological or alternatively mecanical. If you prefer, some boxes can be hidden underground or you might choose a filter that can be immersed. 

Pressurised units allow you the option of powering a waterfall or fountain and more expensive filters feature advanced technology, can handle larger volumes of water or offer functions that are labour saving and can significantly reduce running costs. These include self-cleaning systems and power saving devices that enable the UV filter to switch off when not required.

Filter Capacity

When choosing a filter, consider what is most appropriate for your particular requirements. Follow the manufacturer’s recommendations on the filter’s capacity and the volume of water it can process. Remember that water should be circulated at least once every two hours i.e. a 2000 litre pond will need a filter that generates a flow of 1000 litres per hour.

Don’t forget that if you have fish, take into account how many and how large they are, as this can dramatically affect the specification that is required, as can factors such as whether you want the clean water to be pumped to fountains or other ornaments.

Also think about practicalities such as the ease of maintenance, perhaps a self-cleaning system is preferable. Running costs must also be considered, both in terms of the amount of power required and the durability and longevity of the product parts.

There is no doubt the range of pond filters on the market is daunting and can be confusing. Basic facts such as the volume of water, number of fish etc are vital components in making a decision, the rest is probably personal choice, preferably reinforced by the advice of a specialist retailer.

Related Articles

What To Do In The Garden In April

What To Do In The Garden In April

With warmer weather and an early Easter, the garden centre is busy at the moment with customers stocking up on summer bedding plants - snapdragons, cornflowers, cosmos, verbena, phlox, petunia, As well as filling planters, hanging baskets and borders with colour that will last all summer, there are always plenty of jobs to do in the garden during April and David Coton has these suggestions.

Author: David Coton

Written by David Coton.
Published on Thursday, 29th of March, 2018.

What To Do In The Garden In December

What To Do In The Garden In December

Whether it's a bleak December or the more mild weather we are becoming used to, you can still spend useful time in the garden. David Coton suggests the jobs that can occupy the shortening days.

Author: David Coton

Written by David Coton.
Published on Monday, 20th of November, 2017.

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.

Bermuda Aquatics Brand Back In Business

Bermuda Aquatics Brand Back In Business

The Bermuda brand is back! That's the great news GardenSite partner Andrew Hall has received from Bob Meacham, National Accounts Manager for the new owners Evolution Aqua.

Author: Martyn Loach

Written by Martyn Loach.
Published on Wednesday, 14th of December, 2016.

comments powered by Disqus

Author

Dan Everton

Aquatics Supervisor & videographer

View Profile

RSS

View RSS Feed

Follow Us!

Recent Articles

What To Do In The Garden In April

What To Do In The Garden In April

With warmer weather and an early Easter, the garden centre is busy at the moment with customers stocking up on summer bedding plants - snapdragons, cornflowers, cosmos, verbena, phlox, petunia, As well as filling planters, hanging baskets and borders with colour that will last all summer, there are always plenty of jobs to do in the garden during April and David Coton has these suggestions.

Author: David Coton

Written by David Coton.
Published on Thursday, 29th of March, 2018.

How Can I Help To Save Our Bees?

How Can I Help To Save Our Bees?

Every gardener must have noticed a decline in the bee population over recent years. Intensive farming that demands the use of toxic chemicals, climate change and parasite infestation have all been put forward as potential causes, it's a worrying trend but one that we can all help to reverse.

Author: Martyn Loach

Written by Martyn Loach.
Published on Thursday, 22nd of March, 2018.

Trimetals Launch Two New Guardian Sheds

Trimetals Launch Two New Guardian Sheds

As an excellent alternative to conventional products, Trimetals' storage solutions blend top quality manufacture with contemporary style. Their range has now been extended to include two new maintenance free sheds and Robert Hall has all the details.

Author: Robert Hall

Written by Robert Hall.
Published on Monday, 12th of March, 2018.

GardenSite Visit Zest 4 Leisure Direct New Distribution Centre

GardenSite Visit Zest 4 Leisure Direct New Distribution Centre

Zest 4 Leisure manufactures a large variety of timber garden furniture, fencing and leisure products, David Coton visited their brand new nine acre site near Chester last week to find out more about current development and future plans.

Author: David Coton

Written by David Coton.
Published on Friday, 9th of March, 2018.