Bio-Active Pressure Filters with UV Clarifier

TetraPond Bio-Active Pond Pressure Filter with UV Clarifier
  • TetraPond Bio-Active Pond Pressure Filter with UV Clarifier
  • Bio Active Pond Pressure Filters with UV Clarifier
  • Bio Active Pond Pressure Filter 4000 with UV Clarifier
Product No. 26566
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Bio-Active Pressure Filters provide mechanical and biological filtration to help maintain clear and healthy pond water. Its unique open profile bio-activators provide large surface area and unrestriced water flow to all surfaces for improved cleaning. It is designed with an easy, backflush valve for fast cleaning. This filter also integrates an Ultra-Violet Clarifier that provides permanent control of suspended algae which cause green water. Includes a 2 year limited warranty (excludes bulbs). 9 foot power cord.

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

UV Clarifier
Each Bio-Active Clarifier comes complete with a UV Clarifier Bulb. The UV clarifier works by exposing single-celled algae to very high levels of Ultra Violet light as the pond water containing them is pumped through the clarifier. The water containing single-celled algae comes in close contact with the light from the UV bulb that is protected from the water by a quartz glass sleeve. The Ultra Violet radiation disrupts the algae’s ability to reproduce. The algae die and clump together; at which point they are easily removed by the bio-activators inside the pressure filter.

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:
UV1 - 1500 gal/9 watts
UV2 - 2500 gal/18 watts
UV3 - 4000 gal/18 watts
Bio-Active Pressure Filter With UV Clarifier is rated 3.9 out of 5 by 7.
Rated 1 out of 5 by from Beware - no longer warranty supported First one is still going strong after 3 yearsThe second one bought just a year ago randomly won’t seal draining the pond and Tetra no longer warrants them or makes spare parts like the o-ring kitsFirst support blames the pump (the one their documentation recommends) and only after point that out stated they are end of life and will on pro-rata a refund for what’s left of the warranty.
Date published: 2018-09-07
Rated 1 out of 5 by from Tank cracked over winter - stored dry This would have been the third season. I hooked it up and turned the pump on. Leaked like crazy. The tank had cracked over the winter. Granted it was stored outside but dry. The kicker - but a brand new one because they don't sell the replacement tank.
Date published: 2018-06-06
Rated 5 out of 5 by from Tetrapond 4500 bio pressure filter w/ 1900gpm pump Best set-up running problem free for years. Very easy to get parts. Keeps my heavily stocked 2000 gallon koi pond clear year round. I also use a tetra pond 2500 inline UV sterlizer. Replace bulb every second year.
Date published: 2017-05-15
Rated 5 out of 5 by from They stand by their warranty After a year of great performance, my pond began to green. I figured it was time to replace the UV bulb - normal use is 1 year - but when I opened it up, I found that the power block was cracked. I called customer care to buy a replacement. Instead, they looked me up by my address, told me the filter was still under warranty, and shipped me a new one at zero charge. I didn't need to find my receipt or anything - I just needed to ship the old filter head back to them. That's the kind of customer service that causes me to recommend TetraPond to my friends.
Date published: 2016-05-10
Rated 5 out of 5 by from Excellent Quality After reading reviews on this product I purchased the Pressure BP 1500 model with UV late April of 2016. I was really fed up with prior sponge filters and the work cleaning them. Two things I noted right away. One, the filter was really heavy duty plastic and solidly built. No flimsy parts. Two, the step by step instructions were clear and easy to follow. The instructions also had a help number to call if needed.It's early days yet but I am starting to see improvement in my pond water. Tetra has a good reputation and product quality is important.
Date published: 2016-05-05
Rated 5 out of 5 by from Easy to use I bought the BP 2500 UV two years ago and have found it to be an excellent filter, but what I find even better is Tetra's customer service! The housing for my filter split the winter and I contacted the company to see if I could purchase a new housing rather than buying a whole new unit. Linda at Tetra Pond was most accommodating! I am so pleased. I have used Tetra products for ever, starting with aquarium products when I was a kid and now in my pond. Love this company and their products. Love that they stand behind their products and look out for their customers.
Date published: 2016-04-29
Rated 5 out of 5 by from Absolutley the best filter I've ever owned I purchased a BP1500UV filter with the 3500 pump in August of 2010. This is the 2nd season that it is in service. Prior to this system I had a foam filter sytem and I had to change filters everyday. I almost gave up on my pond because the work, but then I discovered the Tetra filter system that does'nt need filters. My pond water is always crystal clear without ever the use of chemicals. All that is required is backflushing once or twice a week, and this takes about 5 minutes with no mess at all. This is a great filter and I highly reccomend it. I also use the 3500 gal. pump which was reccomended and the water flow is excellent.I also sold my friend on this system and he is very satisfied with his.
Date published: 2012-03-27
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I have a Tetra Pond filter.  How do I get the top off.?  I get a lot of debris, acorns, etc and want to check the inside for build up.  I have done the backwash several times but my flow is diminished.

Asked by: Donna V
Hi Donna V, Lift each lift handle, and drop it so it hangs down the side of the canister. Once all of these are off, you would pry up the lid. If there is a lot of built up pressure, gently use something like a butter knife to insert between the lid and the bottom vessel, and loosen to release the pressure. BREX
Answered by: BREX
Date published: 2018-11-08

What is the actual size / dimensions of the large O-ring for the lid of the bio pressurized filter? I need to try to find a replacement. Thank you!

Asked by: thrash11
It is 314 x 6 mm. BREX
Answered by: BREX
Date published: 2018-11-02

I need to know where I can get new o rings for my Tetra Pond pressure filter especially the ones that are used on the back flush knob.

Asked by: danderas
Thank you for asking! Unfortunately these filters were discontinued. We do not have any parts available for them. You may need to purchase a new filtration system.
Answered by: Tetra Expert
Date published: 2018-10-29

Where can I buy o-rings for the bp2500 ??

Asked by: Turtleguy88
Due to circumstances beyond our control, that filter and parts for it are no longer available. We are working on a solution but it will not be in this fiscal year, unfortunately. We do apologize. If your filter was bought within the last two years, and you have your receipt, please call our Care Team regarding a pro-rated refund. BREX
Answered by: BREX
Date published: 2018-09-19

Would you please send me a copy of both the Parts and the Operations Manuals for the BP-2500-UV? Many thanks

Asked by: toomuchsteve
We have one manual for this filter, and we will certainly send it to you, no problem! BREX
Answered by: BREX
Date published: 2018-09-14

Okay...a total novice here. I bought a BP4000 which came with the white balls. How do the balls get beneficial bacteria on them? 

Asked by: Jim47
Over time, the bacteria grows on them because the water is constantly moving over them and providing a lot of oxygen. Typically, you have a pretty good bio load in about two months. BREX
Answered by: BREX
Date published: 2018-09-13

Do you still have Fountain Block

Asked by: Rick70
Yes, we still make that product. BREX
Answered by: BREX
Date published: 2018-08-30

I have a pond that's approximately 4' long 3' wide and 1' deep. I would like to know what pump would operate with the submersible flat box filter made by Tetra. I have a fountain pump, but it will not attach. Would like the pump designed for this filter.

Asked by: Mechelle
You have a 90 gallon pond, so we would recommend the WGP 325 or 550, depending on what you are housing in the pond, and wish to achieve. Larger is always better because it can be dialed back by installing a ball valve. BREX
Answered by: BREX
Date published: 2018-08-28
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Bio-Active Pressure Filter Guide


Pond Size


BP1500 UV

Up to 1500 gallons  9-watt Clarifier

BP2500 UV

Up to 2500 gallons

 18-watt Clarifier

BP4000 UV

Up to 4000 gallons

 18-watt Clarifier