Bio-Active Pressure Filters

TetraPond BioActive pressure pond filters
  • TetraPond BioActive pressure pond filters
  • TetraPond Bio-Active Pond Pressure Filters 2500
  • TetraPond Bio-Active Pond Pressure Filter 4000
Product No. 26563-00
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The Bio-Active Pressure Filter works to keep your pond clean and healthy with both mechanical and biological filtration. This easy-to-use filter features a unique open profile bio-activator that provides a large surface area and unrestricted water flow to all surfaces for improved filtering. A simple back flush valve allows for fast cleaning.

Mechanical Filtration
Pond water flows down through the bio-activators which remove suspended debris and dirt from the water.

Biological Filtration

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 nitrates, which are absorbed by the aquatic plants and removed by partial water changes. This is known as the “Nitrogen Cycle”.


Bio-Active Pressure Filters come equipped with bio-activators which offer superior filtration and back flush performance over foam. In normal filtration operation, these bio-activators easily trap dirt and debris from your pond and because of their shape they provide a large active surface area for the beneficial bacteria to colonize for upgraded biological filtration. During the back flush operation, 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.

This product comes in the following sizes:
BP 1500 - 1,500 gal
BP 2500 - 2,500 gal
BP 4000 - 4,000 gal
Bio-Active Pressure Filters is rated 2.9 out of 5 by 12.
Rated 2 out of 5 by from Leaking seal Had the pump running for several months. Came home one day to see my pond half empty. Water was leaking from the top seal. Not sure where to get a replacement seal.
Date published: 2017-04-25
Rated 5 out of 5 by from Does the job. Second year in service for the PFL 1500. Adapter broke twice. Too much tension from the rubber one-inch tubing to it. Need more replacement apapters. My bad that this is what it is.
Date published: 2017-04-25
Rated 1 out of 5 by from Bad results The idea you can turn a valve and clean the filter and pond of dirty water sounds nice but has not worked for my pond. Lots of dirty water flows back into the pond when I cycle the valve. Haven't had a clear pond water yet since I installed filter months ago. Just doesn't clean water like bio-filter did. Also, backflush valve continually leaks in closed position. Tetrs bio-filter worked better.
Date published: 2016-07-14
Rated 5 out of 5 by from Great bio filter-easy maintenance I started pounding in 1999 and switched to this biofilter for my 2000 gallon pond about three years ago. It was carried by a water garden business which had been around for 25-30 years in my area. They only carry the best products. I ran 1-1/2 " PVC from my pump and was able to supply a nice stream of water to my waterfall. We have not had one issue with this set up. The built-in uv light works great. It's absolutely easy to clean every few weeks- less than 5 minutes. In October when the weather in Michigan gets cold, I can break the system down easily to winterize it for the spring. I would definitely purchase this biofilter again.
Date published: 2016-07-13
Rated 2 out of 5 by from Inlet/Outlet issues The filter appears to be working as it should. However, the inlet and outlet connectors that come with the unit are too large for the plumbing I normally use for my pond. I have a pressure filter with UV from another manufacturer that has the smaller outlet connectors and I much prefer the "other" manufacturer's product.
Date published: 2016-07-12
Rated 5 out of 5 by from Had it for 3 years, no problems I'm using the filter with a 4200 gph pump in an 1800 gallon pond with lots of koi fish. I have had no problems with the water unless i over feed the fish or it gets really hot for a few days, then i do a 10% water change in the pond. I do water test regularly for ammonium, ph, etc.. And this filter keeps the water at a stable level. You must treat your pond as if it were a big aquarium, same precautions and principles apply to a pond. You must also have lotsnof shade or pond plants on the pond.
Date published: 2015-07-29
Rated 5 out of 5 by from Can't complain. I am on my 4th year with this filter and I am very pleased. I have a 1,700 gallon pond and I am pushing about 3,600 gph through it. When I backwash every month I get a healthy load of "dirt" out of this beast and at the end of the season I really see what has been filtered out and it is ugly. It takes me about two hours to clean it well but it is definitely worth it. Ask my fish!
Date published: 2015-05-27
Rated 2 out of 5 by from Never seemed to really work much! I've had this Bio-Pressure filter 4000 for my pond and even after opening up and cleaning out all the media since backwashing only gets a portion, maintaining my UV light, replacing the tube and fixing the pressure tube that seems to collapse, it still doesn't due much. Time for a change.
Date published: 2015-05-26
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I bought the bp-4000-uv filter the fitting to connect tubing to the filter doesn't fit the 1-1/2 id tubing i purchased its to small there's about 1/8 inch tried clamped down tight won't work so is this the wrong fitting for the filter is there another one

Asked by: Brad662
No, there is only one fitting for these filters, and it takes 1.25" or 1.5". You have to push the tubing to the back of the fitting if you have 1.5". If you are using ribbed tubing, it may not be made to spec. BREX
Answered by: BREX
Date published: 2017-10-03

Where can I buy just a new UV clarifier assembly unit.

Asked by: David 51
These are not available separately. They only come with the filter system. We do have the Greenfree UVC units that can be installed inline. BREX
Answered by: BREX
Date published: 2017-09-21

Do you have a parts list with o-ring locations etc?

Asked by: dennyvd
Yes, we do. It is located in the manual which is available on the product page for downloading. BREX
Answered by: BREX
Date published: 2017-07-25

Hi  Are there any U.K. Suppliers I can purchase one of these bead filters please? Kind regards Allen

Asked by: Al835
Visit our U K site to find one. is the global site, click on the link to the UK. BREX
Answered by: BREX
Date published: 2017-07-18

Where do I find replacement foam sets for my Tetra Pressure Filter PFL 1500 ? I also need water inlet outlet connectors.

Asked by: Anonymous
Just give us a call for assistance. 1-800-526-0650. BREX
Answered by: BREX
Date published: 2017-07-18

Hi filter looks great but are there any UK suppliers where I can purchase one?

Asked by: Al835
Visit our UK site to find out. Go to, and click on the UK link. BREX
Answered by: BREX
Date published: 2017-07-18

I have the 1500 gallon pressure filter. I read that I can use 1.5 inch hose to connect the filter to pump and the filter to the waterfall. The connections that I received only go to 1.25 inches. Are there separate fittings I need to buy?

Asked by: Lovi
No, it comes with stepped down adapters. The 1.5" is all the way to the back of it the adapter. The smaller tip is for the 1.25". BREX
Answered by: BREX
Date published: 2017-06-30

When removing the back flush cap should water be coming out of the backflysh pipe while valve is in pond position? If water is not supost yo be coming out backflush pipe while in pond position what would be causing it to come out?

Asked by: Platinum
Yes, water does come out when the cap is off. That is perfectly normal. BREX
Answered by: BREX
Date published: 2017-06-23
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Bio-Active Pressure Filter Guide


Pond Size


Up to 1500 gallons


Up to 2500 gallons


Up to 4000 gallons