What Type Of Pond Filter Do I Need?

When building your pond it can be hard to work out what elements you need and how to make sure they fit well together. We’ve got some great articles on things to consider before you start building your pond and how to line it but now we want to dig deeper and help you work out all the more complicated aspects of design as well. We’ve got your covered for landscaping and sizing up a pond pump and now we want to move across to another aspect that people often find particularly confusing: your pond filtration system.

Pond filters come in many types, shapes and sizes and with so many options on the market, it’s understandable to feel a little lost when it comes time to selecting the right one for your pond.

Obviously the size of filter you need, how you configure it and where you place it will be unique to your specific pond but as a general rule, the type of filter you’re going to want is fairly universal.


How Do I Know What Size Filter I Need?

Pond filters, like pond pumps, are rated up to a certain amount of litres.

You can work out the volume of your pond by multiply the length by the width by the depth and then multiplying this figure by one thousand.

Once you know this you’ll be able to filter out (see what we did there) products that won’t be useful for your pond.

From here, we suggest getting a pond filter that is a little larger than you think you will need as adding fish and plants to your pond will increase your bio-load which in turn increases your filtration requirements.


What Type Of Pond Filter Is Best?

You’ll hear conflicting ideas across the internet but in our experience, we’ve discovered that the best pond filtration system is one that incorporates both biological and mechanical filtration.

This is because while you need to remove debris and other particles, that alone won’t necessarily keep things clean. By utilising a pond filtration system that both removes nasties mechanically and creates a home for beneficial bacteria that will help keep your ecosystem healthy, you’ll achieve the best results.

We suggest pairing these filters with a filtration pump and utilising a waterfall outlet or Mini Fall to add some extra aeration to your pond.


Where Should I Put My Filter?

This one is entirely up to you. As long as you follow any installation requirements outlined the manufacturer you can put your pond filter anywhere you like.

For a natural look we recommend blending it in with either rocks or plants but if you’re not overly fussed about whether or not your filter is seen, it can literally just hang out by the edge of your pond if you want it to.


Our Top Recommended Pond Filters:

Matala Biosteps 10

The Matala Biosteps 10 is a great choice for those with ponds up to the 10,000L mark.

Utilising four step mechanical and biological filtration, these units can also be fitted with a waterfall outlet to increase aeration in smaller ponds and a UV clarifier to help deal with any planktonic algae issues you may be having.

Koi Clear

The Koi Clear Vortex and Biological Pond Filter is our top recommendation for larger ponds. Offering vortex, mechanical and biological filtration, these units are gravity fed and can be combined with the Spectrum UV if you’re having algae issues.


We recommend these systems as they are both modular and buildable which means you don’t need to worry about whether your pond filtration will always be able to keep up with your fishy friends since you can easily attach another unit to your existing set up if you outgrow it.


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