Tetra - BP4000 Bio-Active Pressurized Filter - 26565

Tetra - BP4000 Bio-Active Pressurized Filter - 26565

Product Details

Tetra, the Bio-Active pressure filter has been re-engineered for maximum bio filtration resulting in a clear and healthy pond. New vortex internal pumping jets ensure maximum water-to-media contact to support bacterial growth and provide for superior bio-activity. The rugged construction of this filter is built to last. The unique open profile bio-activators will not clog and give you the most surface area possible. With no foam to clog, the simple back flush feature keeps your filter performing in peak condition with no need to open the filter for cleaning.

Each pressure filter is sold as either a stand-alone unit or with an integrated UV clarifier to provide permanent control of suspended algae and reduce green water.

  • Model # BP4000 - 26565
  • Maintains clear and healthy water
  • Includes a one step back flush cleaning system for no hassle maintenance
  • Biologically reduces ammonia in ponds
  • Quick to install and can be hidden in the ground
  • Built to last with durable components and materials
  • For out of pond use only
  • Water is pumped from a pump (not included) in the pond up to the filter then back to the pond from the filters discharge. (See illustration below for suggested install).
  • All three ports are 1-1/4" BSP
  • Filter has 1-1/4" - 1-1/2" Step-down Barbed Intake and Discharge. Connect using our 1-1/4" or 1-1/2" Non Kink Spiral tubing.
  • Includes very thorough directions
  • UV Light Not Included (See the BP-4000UV Model for Filter with Integrated UV)
  • Backed by a 2 year limited manufacturer's warranty 
  • Tetra Instruction Manual .PDF

Includes: Bio media rings in media bag, back-flush outlet cap, 1-1/4" to 1-1/2" Step-down Barbed adapter for back-flush port and 1-1/4" to 1-1/2" Step-down Barbed Adapters for Intake and discharge ports.


Tetra Pressurized Filter with or without UVC

Filter Selection Guide:

ClearChoice™ Pressure Filter Selection Guide
Max Pond Size:
Up to 1500 gal
Up to 2500 gal
Up to 4000 gal
Minimum Flow Rate:
2500 gph
2500 gph
2500 gph
Recommended Pump Size:
2500-4500 gph
2500-4500 gph
2500-4500 gph
15.875" Dia x 18.75" H
15.875" Dia x 22" H
15.875" Dia x 25" H


1-1/4" - 1-1/2" Step-down Barbed Connectors 1-1/4" - 1-1/2" Step-down Barbed Connectors 1-1/4" - 1-1/2" Step-down Barbed Connectors

For maximum flow use with 1-1/2" ID tubing.

Selecting the proper size filter:

The selection guide above matches the pond size with the recommended filter model. There is no harm in using a filter that has a greater filtration capacity for your pond size.

Selecting the right pump size:

Some flow can be lost through the filter. According to Tetra: "The water flow may be diminished approximately 40% by the resistance caused by the pressure filter. A pump that is capable of pumping 1000 gph (at the height of the pressure filter inlet) may result in a flow of 600 gph from the filter to the pond. Keep this in mind when selecting the proper pump size."

For these pressurized filters it is best to stay away from high pressure pumps such as "Waterfall pumps" or pumps with high head rates. Tetra recommends the DHP-3600 for the BP1500 and the DHP-4200 for the BP2500 and BP4000 models.

Tetra Information Brochure:

3 Page Informational Brochure from Tetra on this filter line: PDF: 612.46k

Important Note:

It is important not to exceed the recommended flow through the filter. Exceeding the recommended flow rate, could cause leaking or possible damage. A Ball valve can be used if necessary to regulate water to the filter.

Informative Tetra Video

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Estimated Delivery Date

All of our in-stock products usually ship the same or next business day. The table below will show you an estimated* date your order will arrive. See special notes below

Shipping Method Approximate Processing Time Approximate Shipping Time Estimated Delivery Date
Eco-Saver Shipping 1-3 business days if ordered by 12:00 Noon EST 2-10 Business Days
Ground Service Same to Next day if ordered by 1:00 PM EST 2-7 Business Days
3-day Select Same day if ordered by 1:00 PM EST 3 Business Days
2nd Day Ai Same day if ordered by 1:00 PM EST 2 Business Days
Next Day Air Same day if ordered by 1:00 PM EST 1 Business Day
Next Day Air Saver Same day if ordered by 1:00 PM EST 1 Business Day by End of Day
UPS Standard - Canada Within 24 to 72 hours 5-10 Business Days

* Delivery dates are estimates only and can vary due to backorders, order processing delays, payment information, customs clearance, and various shipping delays that may be out of our control. Please refer to the specific product page which will show additional information, as some items may require additional shipping time or ship directly from our suppliers. After we receive your order, an order confirmation email is sent automatically from within our website which will show stock status for the item(s) on your order. Business days are Monday - Friday with Holidays excluded. When your order ships, we add your e-mail address into the UPS software which will send you tracking information, so you can track shipment status online, anytime! Here is a link to our complete shipping information including a UPS transit map: Click Here