Cobalt Prexo Bio-Pressure Filter

Italian innovation upgrades pressure filter design with multistage filtration AND greater ease-of-use. Cobalt Prexo Bio-Pressure Filter keeps pond water clean and healthy with little effort on your part. This easy-to conceal system can be partially buried for discreet, low-profile installation that preserves the beauty of your pond or water garden. Once installed, multiple stages of biological and mechanical filtration do the rest.

Cobalt Prexo Bio-Pressure Filter operates under pressure so there's no loss in flow rate. A steady flow of unfiltered pond water enters and clean, clear water leaves the unit to create water features such as streams and waterfalls. Large, easy-grip backwash valve reverses water flow to activate the filter's backwash system. Accumulated waste is flushed out for rapid cleaning without having to open or dismantle the filter. Prexo UV models enhance long-term water clarity by destroying freefloating green algae and bacteria blooms that cause green and cloudy water. Each model comes complete with filter media, hose barb fittings, and accessories.

Requires appropriately sized pump and tubing (1" inlet/outlet) for operation, sold separately.

Multistage Prexo Filtration
The bottom of the Prexo multistage filter features a waste chamber that collects larger debris, allowing it to settle before they can clog the filter media. A layer of Cobalt Kinshi Sponge provides mechanical and biological filtration designed specifically for koi ponds. This special, low-density mesh is highly resistant to blockage and provides surface area for beneficial bacterial colonies. Cobalt Bioglobes provides dedicated biological filtration for maximum bacterial colonization without restricting water flow. Two layers of filtering sponges, one coarse (Black) and one fine (Blue), provide additional space for nitrifying bacteria while giving pond water a final polish.

Downloadable Cobalt Prexo Bio-Pressure Filter Instructions PDF and Cobalt Prexo Bio-Pressure Filter Media Diagram PDF.
(Both require Adobe Acrobat Reader 4.0 or later - get it here for free)

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Please click on "More Information" for installation and maintenance instructions.

Put the knob found on the top of the filter in the WORK position.

Maintenance
Prexo is equipped with the "Backwash" (reversed water flow) system, which quickly cleans the filter without having to open and disassemble it.

Preliminary "Backwash" system operations: Switch off the pump. Unscrew the cap on the "DIRTY" outlet, located on top of the filter. Fit the third connector supplied in its place. Connect a pipe to the "DIRTY" outlet to carry the wash water of the filter wherever you want. You can activate the "Backwash" system while the filter is in operation by turning the knob on top of the filter to the "CLEAN" position. After cleaning the filter, put the knob back in the "WORK" position.

Put the cap back on the "DIRTY" outlet if you don't use the "Backwash" system for a long period of time. To clean more thoroughly, you have to remove the various filter materials from the filter and wash them under running water. Do not use chemical detergents. To open the filter, loosen the hooks and lift the cover. After cleaning close the filter, making sure you position the cover correctly.

Lamp Replacement
For Models with Built-In UVC Only (Prexo 1800 UVC/Prexo 3100 UVC)
For optimum filter performance, it is advisable to replace the lamp about every 4,000 hours (one season).

Warning: Before carrying out any maintenance on the appliance, you must remove its plug from the electric socket.

Warning: To gain access to the device that emits UVC rays, it is necessary to remove the screw using a suitable screwdriver. Replace the device and make sure that the screw is tightened as before. Remove the knob and remove the lamp socket by pulling it upwards. Replace the lamp and put the lamp socket back in place vertically. Put the knob and screw back in their original places. This operation is extremely important for the safety of persons who might otherwise gain easy access to the device or UVC rays.