This jebao cf-10 pressure filter come with an integrated 13 watt uvc, back wash facility, cleaning indicator and a uvc viewing window. If you have a nature pond with plants, this filter clean up to 1500 gallon pond. If you have a gold fish pond with some plants, this filter clean up to 1000 gallon pond. If you have a koi pond or large fish, this filter clean up to 500 gallon pond. 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 beneficial 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 support 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 crystal clear water. Why this external pond UV bio-filter so effective? Water is slowed down as it passes the lamp to increase UV penetration quartz glass tube covering the UV lamp permits effective penetration of UV rays. Ordinary glass cuts this by 90% UV lamp runs at optimum operating temperature in an enclosed chamber water is kept as close as possible to the UV lamp to maximize UV efficiency single ended lamps last longer and have higher UV output.

• Dual filtration system to provide a clearer and healthier pond or water garden
• Cleans ponds up to 1000 gallons, built-in 13w UV clarifier
• Inlet/outlet size:: 1/2", 3/4", 1" (recommend use 1" hose)
• Easy backwash feature