Laguna Pressure Flo 7500 Uvc Pond Filtration Kit PT1811from £193.99 up to £295.33 Compare prices3→The pressure-flo filter is a sealed pressure filter with a uvc clarifier, designed to provide mechanical and biological filtration for decorative freshwater garden ponds for outdoor use, with a temper more→ature of +4ºc to 35ºc, with or without fish.The purpose of mechanical filtration is to retain and accumulate waste materials from the pond.The purpose of biological filtration is to convert toxic by-products of fish metabolism and other organic waste into much less harmful substances.The purpose of uvc filtration is to inhibit the growth of single-celled algae.The pressure-flo pressurized pond filter provides important water filtration functions that are essential for daily pond maintenance:mechanical an…