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Shower filter for ponds as a powerful stage of biological filtration
The CrawTec Bakki 1200 shower filter is designed for intensive biological filtration of water in ornamental and koi ponds. This type of filtration is used in systems with a high biological load, where standard submerged biofilters do not ensure stable operation. Water is distributed across the upper manifold and passes sequentially through several levels of biological media, becoming actively oxygenated and creating optimal conditions for nitrifying bacteria.
The shower biofilter operates on the principle of cascading water flow through the media. Unlike submerged chambers, where the biological media is constantly submerged in water, in a shower filter the media is sprayed by a water flow and is in constant contact with air. This significantly increases the efficiency of biological filtration and allows for faster processing of ammonia and nitrites.
This type of spray-irrigated pond filter can be used as a standalone biological filter or as a second stage following mechanical filtration. The most effective configuration is considered to be one with a drum filter, where mechanical contaminants are first removed, and the water then flows into the spray-irrigated biofilter for deep biological treatment.
Why is a trickle biofilter effective for koi ponds?
In koi ponds, the load on the filtration system is significantly higher than in ornamental ponds without fish. Intensive feeding, high fish density and a constant influx of organic matter require powerful biological filtration. Submerged biofilters often operate at full capacity, leading to instability in water parameters.
A trickle filter ensures a constant supply of oxygen to the biological media. As water passes through the cascades, intensive aeration takes place, enabling the bacteria to work more effectively. This allows fish waste products to be processed more quickly and helps maintain stable water quality in the pond.
The use of a spray filter is particularly relevant for large koi ponds, where high biological capacity is required. The increased length of the housing provides a greater volume of biological media and allows the filter to be used in systems with high loads.
Design of the CrawTec Bakki 1200 wet filter
The filter features a vertical cascade design with several levels for housing the biological media. A distribution manifold is located at the top, which evenly distributes the water flow across the entire width of the filter. The water then passes through the media levels and returns to the pond’s filtration system.
The filter housing is made from 8 mm thick food-grade polypropylene. This design ensures high rigidity, load-bearing capacity and long service life. Polypropylene is resistant to water and does not corrode, which is particularly important for biological filters.
The vertical layout allows for a large biological filtration area within a compact footprint. The irrigated filter can be installed next to a pond, a filtration chamber, or as part of an existing filtration system.
- multi-level cascade design
- uniform water distribution across the media
- effective aeration of the biological media
- increased media volume
- vertical compact installation
Irrigated filter without media for flexible configuration
The irrigated filter is supplied without biological media, allowing you to select the media yourself to suit specific tasks. You can use ceramic media, plastic biomedia, lava rock or other materials. This approach allows the pond biofilter to be adapted to the required biological load.
The performance of the irrigated filter depends on the selected media, the water supply system and the system configuration. This allows the filter to be used for both ornamental ponds and koi ponds with high fish density. The user can independently determine the required media volume and the optimal operating mode.
The absence of fixed media also simplifies maintenance. If necessary, the media can be replaced or the system upgraded without replacing the filter housing.
Use of the spray filter in a pond filtration system
The CrawTec Bakki 1200 spray filter is used as a biological filtration stage following mechanical cleaning. This setup allows mechanical and biological filtration to be separated, increasing system stability and reducing the load on the biological media. As a result, water clarity improves and pond parameters are stabilised.
The Shower filter can be used as a standalone biofilter for a pond or as part of a combined filtration system. Thanks to intensive water aeration, oxygen levels increase, which has a positive effect on the condition of the fish and the biological balance of the pond.
The shower filter is effectively used in the following systems:
- Koi ponds with high fish density
- Large ornamental ponds
- Systems downstream of a drum filter
- biological filtration of recirculating aquaculture systems (RAS)
- upgrading of existing filtration systems
The use of a spray filter allows for a significant increase in the biological capacity of the system without increasing the volume of the filtration chambers. This ensures stable operation of the filtration system and improves water quality in the pond.