TRIPOND Center Vortex – Multi-chamber filter for ponds up to 115,000 litres

The TRIPOND Center Vortex is a multi-chamber filter made of glass-fibre reinforced plastic (GRP) for ponds with a volume of up to 115,000 litres. The compact system combines mechanical pre-filtration with biological treatment in one pass.

Multi-stage filtration for stable water quality

The water is fed directly to the vortex via an inlet pipe and freed from coarse impurities such as leaves and feed residues. In the brush chamber, further particles and filamentous algae are filtered out. The three subsequent chambers handle the biological water treatment: Different bacterial strains settle on the filter media and break down fish-toxic nitrogen compounds.

Construction and handling

The multi-chamber filter is made of weather-resistant GRP. Pre-assembled PVC drainage pipes and slide gates allow for the separate emptying of each chamber. All slide gates are mounted at a uniform height.

Optional accessories

The vortex comb improves dirt separation in the vortex area. The scope of delivery includes a pull slide, media carrier and connections.

Installation examples

The installation situation influences the function and operational reliability of a multi-chamber filter. Depending on the pond size, available space, and technical requirements, different installation concepts are used.

Law of gravity

The water flows pressure-free through floor drains and/or skimmers into the multi-chamber filter. The filter is usually installed 3–5 cm above the water surface. The floor drain and skimmer are regulated separately to control the flow precisely. This variant is preferred for koi ponds and high-performance pond systems.

Gravity/pump version

Water enters an upstream pump chamber free of pressure via floor drains and/or skimmers, and is actively conveyed from there into the multi-chamber filter. The floor drain and skimmer are controlled separately. This variant allows for flexible placement of the filter system with controllable system operation.

Pump version

The pump is located directly in the pond and actively pumps the water into the multi-chamber filter installed outside. After cleaning, the water is returned via the return line. This variant is technically simple to implement and is particularly suitable for smaller pond systems or for retrofitting existing ponds.

Further information on „Why Multi-Chamber Filters“: TRIPOND Multi-chamber filter GRP | Aqualogistik GmbH

Why multi-chamber filters?

Multi-chamber filters have been considered the foundation of stable pond systems for decades, and for good reason. Not every tried-and-tested technique is outdated. Sometimes it's simply perfected.

Biological stability instead of technical complexity

A healthy pond relies on its microbiology. Multi-chamber filters are designed so that different bacterial strains find optimal living conditions: the mechanical pre-stages (vortex, brush chamber) supply organic material as a nutritional basis, and the biological chambers with Japanese mats offer protected deep colonisation. The result is a dense, stable biofilm that is significantly more tolerant of peak loads – for example, due to feeding breaks or treatments – than thinner biofilms on smooth plastic carriers.

Keine beweglichenteile – keine mechanischenausfälle

The multi-chamber filter operates without sensors, control boards or motors. What isn't installed can't fail. The system continues to run passively during a power outage – the bacteria on the Japanese mats survive for hours to days in the moist environment and resume operation immediately after restart.

Winter operation without restrictions

Large volumes of water and the absence of fine capillaries make the covered multi-chamber filter frost-resistant. The biology remains active all year round – a calm start to the spring season can be planned, not dependent on chance.

Planned maintenance

Cleaning a multi-chamber filter is simple and entirely up to you: open the slide valve, drain off the dirty water, and you’re done. It takes around 20–30 minutes a week. When you open your filter, you can also check the condition of your pond’s ecosystem – the consistency of the sludge, the smell, and any visible parasites. This direct feedback acts as a practical early warning system.

Economically sustainable

GRP is not subject to any technical wear and tear. A multi-chamber filter made of glass-fibre reinforced plastic functions just as well after 20 years as it did on the first day. Wear parts are limited to occasional seals on the slide valves. Consumables are completely eliminated.

In short, the multi-chamber filter solves no technical problem through more technology – but rather through biology and physics. Those who prioritise long-term stability over short-term ease of use are making a decision with a multi-chamber filter that will pay off over the entire lifespan of the pond.