Stainless Steel Drum Filters

for koi ponds, garden- and swimming ponds

A well-planned pond blends in harmoniously with the surrounding and enriches it. He reveals to the viewer a distinctive, autonomous world. This creates a long-lasting joy, that fascinates you again and again.

To assist you in preserving the beauty of your pond, Inazuma has developed world-class pond filter systems that minimize cleaning and maintenance requirements without the need for consumables.

Inazuma gives you more time to relax and enjoy the beauty of your pond.

Production Process

Quality made in Germany

Because of our high demands on perfection and consistent quality, only one production site comes into question: Germany.

Only certified specialized companies with qualified personnel are involved in the production.
All Inazuma drum filters are made of stainless steel V4A (1.4571). The processing happens using the latest technology, e.g. laser cutting, TIG welding robots and bath pickling. Also, our control elements are thanks to microprocessor technology technically up to date.

areas of application

Inazuma Filters – the right choice

Inazuma drum filters are specifically developed for the usage on koi- and swimming ponds. Innovations, like e.g. the automatic rinsing flush and the stripping brush allow an improved filtration result and therefore reduce the need for maintenance work. We also offer customized solutions for industrial applications.

Koi ponds

Inazuma filters keep your koi pond clean and algae-free. The contamination by feed and your fish gets cleaned off automatically. The water stays clear so your koi will remain healthy and you gain more time look at them in their full splendor.

Swimming ponds

Swimming in clean, pure water is more enjoyable. But through foliage, mud and dirt, enormous cleaning needs arise. With a functional, automatic filter from Inazuma, the cleaning effort is reduced to a minimum. Enjoy your pond instead!


Inazuma filter systems are also used in industrial applications. Like in hydroponics aquaculture, fish farming, paper industry, zoological and botanical gardens, as well as agriculture, to name a few examples.

guiding principle

We make good things even better

Our goal has been to develop a long-life, long-term and almost maintenance-free pond filter. That's why Inazuma drum filters originate from practical experience. True to our motto "making good things even better" we renounce frequent model changes. Instead, our present filter systems are continuously improved.

The number of our now over 1500 clients speaks for itself. We urge you to convince yourself on the following pages about the quality of our products. If you have any questions, we will be pleased to assist you by phone.


of the Inazuma drum filter system

The extra fine screen (50 µ) made out of stainless steel V2A removes even the smallest soil particles from the water. No fresh water supply is needed. The high pressure pump is directly build into the drum filter and is included with delivery. Special float gauges register the water level inside the drum filter and a microprocessor control system with dry-run protection regulates autocratically the rinsing process. When the pollution of the filter screen increases, the direct drive gear motor and the high pressure pump get driven. The drum begins to rotate and the high pressure pump begins to lead water to the high-pressure nozzles at approx. 5 bar pressure. Dirt like faeces, algae and food remains get directly flushed into the drain and taken out of the water cycle. The drum filters without a bio chamber are an excellent choice for automatic filter systems for fish farms, aquacultures and process water treatment.

All Inazuma drum filters are made in Germany. Most recent production technologies, e.g. laser cutting, guarantee the highest degree of quality and durability of your drum filter. All components are industrial grade.

Thanks to our high quality requirements, that Inazuma demands of its own products, not only private owners of garden- and swimming ponds count as our clients. An increasing number of companies and public institutions opt for an Inazuma drum filter system. Therefore, our filters are used in zoos, open-air pools and swimming pools, as well as in the textile industry and cellulose processing facilities, like the paper industry, chemical factories, water management and in the beverage and food industry.




... enjoy a long and unclouded pleasure of clear water in your koi pond, swimming pool or garden pond.


Johannes Kurzweil GmbH

Eisackstraße 16

86165 Augsburg Germany


Tel:  (0049) 821/7291971

Mo to Fr: 9 – 12 a.m., 1 – 4 p.m.

Fax: (0049) 821/7291973


VAT ID No.: DE 293301939

WEEE-Reg.-No.: DE 19429673

Licensing No. (VerpackV): VV 600022


Technical modifications and errors excepted.


86165 Augsburg Germany