Enjoy cleaner, healthier ponds and water gardens with less effort. The improved TetraPond Bio-Active Pressure Filters employ advanced bio-active media that resists clogging, even after extended periods of pond filtration. Distinct open profile media boasts large surface area for beneficial bacteria. The result is highly efficient biological filtration that effectively breaks down toxic ammonia and nitrite in pond water.
Hassle-free backflush feature cleans these pressure filters in less than 2 minutes with no need to open the filter. Maintains peak filter performance for exceptional mechanical and biological pond filtration. UV-equipped models have the added water clarifying power of ultraviolet light for sparkling, green-free water. Available in 3 capacities, with or without UV filter. Inlet and Outlet are 1-1/2" barbed fittings. Appropriately sized pump and tubing sold separately.
Please Note: Do not use pumps with flow rates less than 2,500 gal/hr. A minimum of 2,500 gallons per hour is necessary to perform the backflush operation. A flow valve may be required to adjust the flow rate through the pressure filter.
Please click on "More Information" for instructions.
|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 Works
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-Activators
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.
Positioning Your Pressure Filter
Caution: The discharge tubing ID should not be smaller than the intake tubing.
Assembling the Pressure Filter for Operation
Note: It is very difficult to assemble the filter if the bio-activators are dry.
Installation Option - Using a Tub
Note: If you bury the filter without a tub, the filter will be difficult to remove.
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 Filter
Cleaning and Maintenance
How it backflushes
A thin layer of bio-film containing beneficial bacteria will remain on the bio-activators. There is no need to replace the bio-activators. The discharged water is full of nutrients and can be used to nourish the garden plants.
Tip: If the water flow still looks weak after the backflush operation, open the lid and check to see if the strainer is clogged with string algae or debris. Remove any debris that has accumulated on the cage. Be sure the vessel is about half full of water when reassembling the filter.
TetraPond Bio-Active Pressure Filter with UV
How the Greenfree UV Clarifier Works
The ultraviolet radiation disrupts the algae's ability to reproduce. The algae die and clump together, and then the algae can be easily removed by the bio-activators inside the pressure filter.
For most ponds with normal levels of green water algae, the clearing process should take about one week. However, with thicker algal blooms this may take 2-3 weeks. The UV clarifier will reduce the growth of the algae, but water clarity is also dependent on the pond filter removing the dead algae.
When installing the UV clarifier on a pond that already contains green water, the clarifying process can be rapidly accelerated by use of TetraPond Water Clarifier liquid that clumps single-celled algae and other particles together so they can easily be removed by the filter bio-activators.
Unplug the UV clarifier if the pond is being treated with fish medications.
The pressure filter is not for submersible use, and should not be installed inside the pond.
UV Bulb Installation
Tools Needed: Phillips Head Screwdriver, Coin, and Soft Cloth or Tissue. To install the UV bulbs, please carefully follow these steps in sequence.
Caution: Quartz sleeve must be dry inside. Wipe smudges off quartz tube if necessary.
Installation of New Bulb
Only now can the unit be connected to an electrical source. Caution: Use only with GFCI rated electrical circuits. Please see safety instructions for details before operation.
UV Viewing Tube
Caution: During the winter, the fish in the pond go through a period of rest where they become very inactive and waste production becomes very low. At this time, the filter should be emptied of water so that freezing water does not damage the unit:
Note: The warranty does not cover damage to the filter due to freezing water.
Starting your Filter for Pond Season
Tips to Avoid or Minimize Green and Cloudy Water
Feed Fish Highly Digestible Foods
The Role of Plants
String Algae Control