AQUA NOVA - NPF-40 - Up to 20,000 liters - Pond UV filter

Features :

• The filter unit is IP44 rated and can be buried in the garden up to the cover.
• 6.2m 240V cable with externally mounted IP44 ballast.
• 360 degree outlet head adjustment.
• Cleaning indicator for foam sponge maintenance
• Uses industry standard PL-S 7WTUV bulb.
• Epoxy encapsulated UVC electric head for assured reliability.
• "20/25/32/40mm outlet adapter and 1"" BSP male threaded inlet and outlet.

How does the filter work?

Stage 1 - Mechanical Filtration: Water is pumped through the filter, creating the pressure needed to start the mechanical filtration stage. Two foam trays collect unwanted organic debris of varying sizes, supporting the growth of a host of beneficial bacteria that break down harmful contaminants.

Stage 2 - Biological filtration: In this stage, the water passes through a biosphere located at the bottom of the filter. Their large surface area provides a habitat for the growth of beneficial bacteria that naturally convert harmful ammonia and nitrite toxins into useful nitrates to support a healthy pond environment.

Stage 3 - UV Clarification: The water, which may contain microscopic algae spores in suspension, passes through the UV lamp which clumps and kills the spores resulting in crystal clear water.

Why use this filter?

• The water is slowed down as it passes through the lamp to increase UV penetration.
• The quartz glass tube that covers the UV lamp allows effective penetration of UV rays.
• Ordinary glass reduces this penetration by 90%.
• The UV lamp operates at optimum operating temperature in a closed chamber.
• The water is held as close to the UV lamp as possible to maximize UV effectiveness.
• Single-ended lamps last longer and have higher UV output.

UVC Lamp Replacement Information: Correct procedure should be followed when installing the UV lamp. To prevent damage to the quartz sleeve, if you have any difficulty during installation, contact us for assistance. After 8000 hours (12 months), the lamps begin to lose efficiency or fail. This is noticeable in the summer, as the pond water can take on the dreaded cloudy green color on hot days.

Filter foam maintenance. The UVC filter/unit must be run dirty to preserve bacteria. If the foams are blocked, remove them and wash them only in a bucket of non-chlorinated water (eg pond water). Foams will often shrink. The unit still works, but you can restore the original size by carefully steaming the foam over boiling water.