Pond Box Filters

Keep your pond water healthy and clear all in one unit. Pond box filters combine biological filtration and a UV clarifier in a compact and easy to install unit for cost effective maintenance. At Swell UK, we have a range of Pond Filters from top brands such as Evolution Aqua, Oase, Blagdon, and even our own high quality range!

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Help and advice on shopping for: Pond Box Filters

Choosing the right pond box filter

Selecting the best filter for your garden pond is essential for keeping your pond water heathy and clear. One key consideration is to check your pond pump compatibility, making sure the flow rate matches the filter's recommended input range. It is also important to bear in mind the volume of your pond, the amount of fish you have, and to consider the filtration stages and maintenance requirements that best suit your needs.

For more help choosing a filter, check out our detailed guide here.

Why choose Swell UK?

At Swell UK, we provide:

  • A large selection of top brands.
  • Price match guarantee: for low prices on all your favourite brands (see T&Cs.)
  • Reliable and fast shipping, with next day delivery options.
  • Expert advice: Need some advice? Our pond experts are here to help!

Frequently Asked Questions

How does a pond filter box work?

These filters combine a UV light with a filter to treat the water and remove algae. Keep your pond clean and healthy with a filtration system used by experts, and save on the cost of purchasing separate units. These models have huge media capacities, making them perfect for adding your own media such as alfagrog and carbon. As well as this, they are simple to maintain, requiring far less cleaning than other filter types.

What is the difference between a box filter and pressurised filter?

A box filter is situated above the pond, utilising gravity to let water flow naturally back into your pond. Pressure filters can be placed below water level and push water to features such as waterfalls. Choosing between the two depends on your needs, as pressure filters are often more compact, but box filters have a larger capacity and are easier to maintain.

Check out our comprehensive guide on the different types of filters here.

Do box filters need a pump?

Yes, they require a pump to move water from the pond into the filter, without one water will not circulate through the filter media. It is important to make sure the flow rate of your pump matches your filter.

Can a box filter clear green water?

As long as the pond filter you choose features a built-in UV clarifier you won't have to worry about green water anymore. The UV clarifier damages floating algae cells using ultraviolet light, causing them to form clumps which are then removed by the filter, allowing for a crystal clear pond.