Pond Pressure Filter 20L with 9 Watt UV, Multi-stage biological, mechanical and UV filtration provides maximum pond filtration, Features simple action back flush cleaning

• The filter unit is IP44 rated as weatherproof & can be buried in the garden up to the lid
• 12VAC low voltage, including 12VA IP44 rated weatherproof transformer
• 7.5m LV cable plus 1.8m mains flex on transformer
• Full 360 degree outlet head adjustment
• Cleaning indicator for foam sponge maintenance
• Uses industry standard PL-S, 9W TUV bulb
• Step-down outlet adaptor 12.5/20/25mm & 1 inch BSP male threaded outlet & inlet
• Capacity = 20L

HOW DOES IT WORK?

STAGE 1 - MECHANICAL FILTRATION:

Water is pumped into the filter creating the necessary pressure to begin the mechanical filtration stage. Two foam discs collect various sizes of unwanted organic debris encouraging the growth of large numbers of benificial bacteria which break down harmful pollutants

STAGE 2 - BIOLOGICAL FILTRATION:

At this stage the water passes through the bio-balls at the bottom of the filter. These have a large surface area & provide a habitat for beneficial bacteria to grow which naturally convert the harmful toxins of ammonia & nitrites into useful nitrates to supporty a healthy pond environment

STAGE 3 - UV CLARIFICATION:

The water which may contain microscopic suspended algae spores passes the UV lamp clumping and killing the spores to give crytal clear water

* This filter requires a 4500 to 6000LPH pond pump