The Tetra Bio-Active Pressure Filters with GreenFree UV Clarifier are designed similar and include the same benefits as the regular pressure filters. - Use pumps between 2,500 - 4,500 GPH on all models - 2 Year Manufacturer Warranty - Pressure Filter & UV Sterilizer with easy Back Flush operation - For Maximum Flow use with 1.5" ID tubing. Also fits with 1.25" ID tubing The Tetra UV Bio-Active Pressure Filter also integrates an Ultra-Violet Clarifier that provides permanent control of suspended algae which cause green water. The dome on top of the Tetra Bio-Active Pressure Filter protects the clarifier. Note: Do not use with pumps that exceed 4500 gallons per hour. This could damage the filter. Do not use pumps with flows less than 2500 gal/hr. A minimum of 2500 gallons per hour is necessary to perform the backflush operation. All pressure filters restrict the flow from your pump. Expect about a 45% reduction in the water flow through the filter. How It WorksMechanical Filtration: Pond water flows down through the bio-activators, which remove suspended debris and dirt from the water. Biological Filtration: Occurs on the massive surface areas found in the bio-activators. Beneficial bacteria will naturally colonize on the surface area and convert harmful pollutants in the water into relatively harmless nitrate, which are absorbed by the aquatic plants and from partial water changes. This is known as the "Nitrogen Cycle". Open Profile Bio-ActivatorsTetraPond's new Bio-Active Pressure Filters come equipped with open-profile bio-activators which offer superior filtration and backflush performance over closed bio-media and foam. These bio-activators have been perfected and used in the commercial aquaculture industry where demanding filtration is required due to extreme environmental conditions. The advanced technological design of the bio-activators provides a large active surface area for the beneficial bacteria to colonize. During the backflush operation, these bio-activators provide unrestricted water flow to all the surfaces so that dirt and debris are thoroughly removed while leaving the beneficial bacteria on the bio-activator surfaces intact and robust. Filtration Process Pump water from the pond to the pressure filter. Water is mechanically and biologically filtered. Filtered water is forced up the center tube. In models with a UV Clarifier, the UV light destroys the single-celled algae's ability to reproduce. Filtered water is forced under pressure to the waterfall or stream. Positioning Your Pressure FilterGeneral Installation Instructions: Position the pump far from the waterfall or stream for maximum pond circulation. Position the pressure filter anywhere around the pond. Since the discharge is under pressure, it may be located downhill from the waterfall if you choose. Connect pump to the filter with tubing. Connect filter discharge port to the waterfall with tubing. Caution: The discharge tubing ID should not be smaller than the intake tubing. Concealment Tips: The filter can be hidden behind rocks or bushes and can even be partially buried. If burying the filter, it is recommended that you place a plastic tub in the hole. This allows easier access to the latches, and makes it easier to remove the filter for winter storage. Plastic tubs are inexpensive and are widely distributed in stores selling hardware and houseware products. 20-gallon tubs are ideal for this use. Assembling the Pressure Filter for OperationBefore attaching tubing to the pressure filter, perform these simple assembly steps: Open filter lid. Remove bio-activators from vessel. (Bio-activators come in a separate plastic bag and are packed with the filter inside the sales box). Fill the filter vessel up to about 50% with pond water. Pour bio-activators in the vessel. Place lid back on and close. Note: It is very difficult to assemble the filter if the bio-activators are dry. Installation Option - Using a Tub Dig a hole about 3 in. deeper than the tub. Put a 3 in. layer of stones in the hole for drainage into the soil. Drill 4 to 8 drainage holes in bottom of tub. Place tub in the hole. Put bricks or wood blocks in bottom of tub to elevate the pressure filter to the desired height. Place stones and plants around the filter and tub to hide them. Note: If you bury the filter without a tub, the filter will be difficult to remove. Tubing AttachmentFor maximum flow, use 1-1/2 inch ID tubing. Also fits 1-1/4 inch ID tubing. TIP: For maximum flow; attach the largest tubing fitting. Use a saw to cut the filter outlet / inlet fitting(s) to match the tubing you have selected. "Maturation" Of Your FilterA biological filter must undergo a period of "maturation" before it is fully efficient. During this period of time, beneficial bacteria grow and colonize on the biological filter media until the bacteria population is large enough to purify the waste in the water. The initial maturation of the filter takes approximately 4 to 6 weeks (after spri.
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 | Tetra Pond 26566 BP1500UV Small 1500 UV Beaded Pressure Filter With UV |  | 306.91 | |
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 | Tetra Bio-Pressure Filter w/UV Clarifier / Size (BP1500 w/ 9w UV) |  | 304.25 | |
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| | Tetra 26566 BP1500UV Tetra Pond Small 1500 UV Beaded Pressure Filter With UV |  | 342.41 | |
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