The Difference Between Box Filters & Pressure Filters

If you currently have a pond in your garden then you’ll know the importance of a high quality filtration system. In this day and age there are many types of pond filtration available, from In Pond Filters to Box Filters, Multi-Bay FIlters, Pressure Filters and Drum Filtration.

With so many options on offer we are going to focus on box filters and pressure filters, identifying the key differences and helping you choose which system is best for you. It is important to remember that a filter is an integral part of any pond and the more you invest in the system the first time around, the more you will save in the long run.

Do I need a pond filter?

This is a question we hear all the time at Pond Planet! It all comes down to your pond and what you use it for. If you are planning on keeping fish then a filtration system is vital, fish can create a lot of waste and the best way to remove this is by using a pond filter. When caring for a pond it is important to never leave it unfiltered, the water can become polluted causing it to appear cloudy and potentially smell. Remember a polluted pond can be detrimental when it comes to fish.

What type of ponds are pressurised and box filters best for?

Box filters and pressure filters are both ideal choices for small to medium size ponds. If you are looking for the best way to provide filtration to your garden pond then we would advise opting for a box filter. This classic system gives longer contact time with the media within the filter, due to the water being pumped through a bigger unit in comparison to a pressurised filter. However we would suggest looking into our selection of pressurised filters if your installation requirements dont allow for a bulkier box filter.

Are box filters and pressurised filters different to install?

As opposed to flow-through box filters, pressurised filters are sealed units meaning the water is still under pressure when leaving the filter. The pressurised return allows them to feed higher positioned watercourses or water features, allowing much more flexibility in the positioning of the unit. Box filters on the other hand return the water to the pond with the help of gravity whilst still maintaining a balanced nitrogen cycle through the promotion of friendly bacteria in the biological media.

Box filters must be installed above water level, which is why many people choose to disguise theirs with the aid of a waterfall or custom designed rockery. These can both be created around the filter itself using shrubbery as an aid to complete the natural disguise. When it comes to installing the filter you will need a length of polyhose and the appropriate hose clips as these will prevent leaks. Make sure you peruse or range of box filters and pumps online at Pond Planet today.

A firm favourite in the water world, pressurised filters are extremely easy to install and can be partially buried in the ground adjacent to the pond. Doing this means they will not disturb the natural look of your garden, even if installed right next to the pond. Pressure Filters can also be installed in the ground below the surface level of the water to ensure for a neat finish. Most pressurised filter units have 3 hoses to attach, these will be the inlet, outlet and the back-flush outlet (this is blanked off while the unit is in operation). The inlet, outlet and back-flush outlet are all generally clearly marked meaning that you will have the system set up in no time at all, leaving you more time to enjoy your pond. Most manufacturers have their Pressure Filters available as Pump and Filter Kits which provides the optimal pump and filter combination all in one box. Many pressure filters offered at Pond Planet also have filter rock covers available from stock, which allow you to blend the pond filter seamlessly into the surrounding landscape.

Do box filters and pressurised filters work differently?

Almost all pressure filters and modern box filter systems combine an integral UVC with mechanical and biological filtration to provide not only clear but healthy ponds for fish and other pond inhabitants.

Are pond filters easy to clean?

In most cases pressurised filters do need to be cleaned more regularly than box filters. If your pond is home to fish then your filter of choice may need extra attention more regularly. Some of the pressure filters available at Pond Planet, such as the Oase Filtoclear, Laguna Pressure Flo and Hozelock Bioforce Revolution have built in easy clean backwash systems to allow simple cleaning of the filter in a matter of minutes without the removal of the lid. However if you opt for a pressurised pond filter that does not have this built in function, then we would advise checking the chamber frequently. Alternatively box filters should be cleaned every 2-4 weeks to ensure the system can work to its best potential.

It is important to remember that you cannot over filter a pond, if your budget will stretch to a filter that offers an excess capacity then we would always advise in opting for this as it is a worthwhile investment in the long run.

There will always be mixed opinions when it comes to filtration systems, some may find their pond survives perfectly without however this is usually a rare case scenario. Our excellent selection of pond filters mean that there is no excuse for a pond to be left in an uninhabitable state.

Be sure to check out our complete range of pond guides online at Pond Planet today.

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