How do you winterize this in an area that gets below freezing?

I live in NJ and every fall I shut the flow valve to the filter - I have a waterfall that I let run for a few more weeks until we start getting ice - disconnect the filter from the water line. I then clean it out - in particular the material inside that the good bacteria grows on - and place it in the garage to dry out for a few weeks. I then take it down into the cellar for the winter. I know of no way of winterizing it in place and leaving it ourside for the winter. The water will freeze and I wouldn't want to add even "non-toxic" anti-freeze to any pond equipment. Hope that helps.

I still need a pump for this right?

Yes you do. I use a Tetrapond DHP4200 Debris Handling Pump. Don't use a pump stronger then that.

am going to buy the BP2500. Want to know what inlet and outlet pipes diameter are?

Inlet/Outlet 1.25 in., 1.5 in./1.25 in., 1.5 in.

Does anyone know the size of the large oring included in the filter? I need to replace the original one I have and the kit is $34 for a lot of extra parts I don't need.

I believe I have the same filter problem and the O ring measures 12 inches across. does this sound like it is the right one? I need to replace it also. Where do you order the KIT?

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Tetra Pond Bio-Active Pressure Filter, for Ponds Up to 1500 Gallons | 2-Step Mechanical & Biological Filtration, For Clean & Healthy Ponds, Easy To Clean With Backflush Valve

Product ID: 8016537

💧1500 gal capacity

🔄Easy backflush cleaning

🦠Max bio surface area

$873.82

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Description

💧 Keep your pond flawless and your weekends free!

BIO ACTIVATOR BOOST - Maximized surface area for beneficial bacteria to naturally purify your pond water.
TRUSTED TETRA QUALITY - Backed by decades of aquatic expertise and frustration-free packaging for easy setup.
HASSLE FREE MAINTENANCE - Innovative backflush valve lets you clean without opening the filter—no mess, no stress.
POWERFUL 1500 GALLON CAPACITY - Perfect for medium to large ponds, ensuring broad coverage without compromise.
CRYSTAL CLEAR WATERS EFFORTLESSLY - Dual mechanical & biological filtration keeps your pond pristine and healthy.

The TetraPond Bio-Active Pressure Filter is engineered for ponds up to 1,500 gallons, combining mechanical debris removal with biological filtration via high-surface-area bio-activators. Its easy backflush valve streamlines maintenance, ensuring continuous optimal water quality without hassle. Trusted since 1951, Tetra delivers reliable, efficient pond filtration that keeps your aquatic environment clear and healthy.

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