Laguna Pressure-Flo Filters are high performance water filtering systems that keep pond water clean and healthy. These all-in-one filters provide mechanical, biological* and UV sterilization and are designed to work in tandem with a solids handling pumps such as Laguna’s Max-Flo. This great inline filter unit can be added to most pond installations by simply cutting a waterline from the pond pump to an existing water feature, like waterfalls or streams. The Click-Fit connecters help make installation quick and easy. The Laguna Pressure-Flo Filters also feature a revolutionary Backwash-Cleaning System that easily cleans the entire surface of the foam filters without opening the filter. This patent-pending system is one of a kind. Backwash cleaning can be done easily and comfortably in a few minutes without opening the lid. This feature ensures that the filters perform at optimal levels for many days and prolongs the time between full maintenance sessions. An easy-view cleaning indicator signals when it’s time to perform backwash cleaning. The Laguna Pressure-Flo Filters are for use in freshwater aquariums only. *Pressure-Flo 700 does NOT have a biological filtration chamber. Four Models of Laguna Pressure-Flo Laguna Pressure-Flo 700: The Laguna Pressure-Flo 700 UVC is for ponds up to 700 gallons and includes the following: 11-watt UV lamp Filter foam Laguna Biospheres Universal Click-Fit fast coupling for ¾-inch, 1-inch, and 1 ¼ inch hosing. Laguna Pressure-Flo 1400: The Laguna Pressure-Flo 1400 UVC is for ponds up to 1,400 gallons and includes the following: 11-watt UV lamp Filter foam Laguna Biospheres Universal Click-Fit fast coupling for ¾-inch, 1-inch, and 1 ¼-inch hosing. Laguna Pressure-Flo 2100: The Laguna Pressure-Flo 2100 UVC is for ponds up to 2,100 gallons and includes the following: 20-watt UV lamp Filter foam Laguna Biospheres Universal Click-Fit fast coupling for ¾-inch, 1-inch, and 1 ¼-inch hosing. Laguna Pressure-Flo 3200: The Laguna Pressure-Flo 3200 UVC is for ponds up to 3,200 gallons and includes the following: 25-watt UV lamp Filter foam Laguna Biospheres Universal Click-Fit fast coupling for ¾-inch, 1-inch, and 1 ¼-inch hosing. Intended UseThe Laguna Pressure-Flo filter is a sealed pressure filter with an integrated UV-C sterilizer designed to provide mechanical and biological filtration in outdoor fresh water ornamental ponds with a temperature from 39.2° to 95° Fahrenheit, with or without fish. The purpose of mechanical filtration is to trap and accumulate debris and waste material coming 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 UV-C filtration is to inhibit single-celled algae growth. All ponds will benefit from the addition of a filtration system. A good filtration system, such as the Laguna Pressure Flo ensures that the water quality of the pond will remain clear of impurities which can accumulate and create a cloudy or toxic environment for pond plants and fish. The Laguna Pressure Flo will provide your fish with a clean and clear environment to live a healthy life in. How Pressure-Flo Filters Work Pressure-Flo filters are designed to provide three important water filtration operations that are essential for keeping pond water clear and healthy: mechanical and biological filtration, and UVC sterilization. The filters are designed to work in tandem with a solids handling pump. For best results, use a Laguna Max-Flo circulating pump. With the filter connected to the outlet of a pump, water enters the unit through the water inlet. It is then forced to pass through the mechanical filtration stage, consisting of foam filters that intercept and trap dirt and debris. Next, water reaches the biological filtration* chamber where it comes into contact with beneficial bacteria. Finally, dirt-free water passes along the UV-C lamp unit, where it is exposed to ultraviolet rays that inhibit algae growth and green water. Water then returns to the pond through the outlet. Backwash-Cleaning System During operation, coarse debris is captured at the surface of the foam filters. As a result, sooner or later depending on pond conditions, the external surface of the foam filters will clog and hinder proper filtration, because of reduced water flow. The limited water flow through the foam filters reduces the effectiveness of both the biological and UV-C filtration. This condition can easily be detected thanks to the cleaning indicator on top of the filter unit. Pressure-Flo filters feature a unique Backwash-Cleaning System that completely cleans the entire surface of the mechanical foam filters without opening the filter or shutting off the pond’s pump. The Backwash-Cleaning is performed by two foam filter scrapers, which are operated by using the plungers located on top of the filter unit’s lid. While the pond pump is running, simply turn the backwash valve to the backwash position and begin pulling the plungers one at a time up and down until the water being discharged is clean. After cleaning the filter will perform at optimal levels for many days. The Backwash-Cleaning System prolongs the time between filter breakdown maintenance sessions and in most cases only end of season breakdown cleaning will be necessary. Pond Tip: When backwashing or performing maintenance, use the backwash water in your garden - it"s an excellent natural fertilizer! Unlike other pressurized filters, water travels through mechanical filtration (where large particles are filtered out) before entering the UV chamber, making the UV sterilization process much more efficient. Cleaning Indicator This unit features a cleaning indicator, which lets you know when the filter needs backwashing or cleaning. The red indicator height is approximately proportional to the filter clogging level. When the red indicator is low, the filter is clean, when the red indicator is at the top of its stroke, the filter needs cleaning. The cleaning indicator may be affected by many variables, such as waterfall height and pump performance. Its operating characteristics have been calibrated according to specific application conditions. Different application conditions may lead to different results. Breakdown of Filters