Drum filters are becoming the new favourite amongst koi keepers due to their minimal maintenance, high performance and clear-as-glass water outcome. But are they the right fit for your pond system?
At That Pond Guy, a trusted name in pond filtration and care, they often recommend top-quality systems including options from Oase. Known for reliability and engineering excellence, Oase drum filters are among the most efficient choices for serious koi keepers.
What Exactly is a Drum Filter?
A Drum filter, also known as a Rotary Drum Filter, is a mechanical filtration unit that entraps fine solid waste material before its deterioration into the water. It employs a stainless-steel mesh screen to trap particles, some as small as 60 microns.
As the mesh starts getting clogged, the filter goes into an automatic cleaning mode. Debris is shot off the mesh and out of the system using water jets for an efficient, hands-off clean.
Key Advantages of Drum Filters
For medium to large koi ponds, especially those with a high fish load, drum filters offer a long list of benefits:
- Automatic cleaning that reduces manual labour
- High flow capacity without the risk of clogging
- Excellent particle removal down to 60 microns
- Multiple inlets for skimmers and bottom drains
- Minimal water loss during cleaning
- Compact footprint compared to performance output
- Better water clarity and quality year-round.
All these characteristics imply that you will have more time to enjoy your koi and less time cleaning filters.
Things to Consider Before You Buy
While drum filters are impressive, they are not for every pond setup.
These are some of the points to consider:
- More expensive to purchase than manual filters
- Requires electricity and possibly professional installation
- Needs level ground and proper installation height (especially for gravity-fed systems)
- In colder climates, protection in winter is required.
It is also important to ensure your pond has a sufficient flow rate, as drum filters thrive in higher-flow environments.
Is It Right for Your Pond?
Drum filters are ideal if you:
- Have a medium to large koi pond
- Keep a substantial fish stock
- Want professional-grade filtration
- Prefer low-maintenance systems
- Make clear water a priority
But where the pond is very small, less than 2,000 litres, or where the power supply is not reliable, a drum filter may not be suitable.
Choosing the Right Drum Filter
There are two main types: mechanical-only and combi drum filters (which include a biological chamber). Which one you use is determined by your pond configuration, stocking densities and the space you have available.
A combi unit makes plumbing straightforward, whereas individual components can provide greater flexibility.
Also consider:
- Initial and spare part costs
- Availability of replacement components
- Options such as UV-C lights and digital controls.
Final Thoughts
A drum filter is a powerful investment for serious koi keepers who desire the finest quality of water and minimum maintenance. Compact, high-efficiency, automatic cleaning and these filters are transforming the way hobbyists maintain their koi.
If you are about to make a new pond or wish to improve your filtration, a drum filter may be the right move.