AlphaONE 4.25 Filter from GCTek

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Specification Details
Model AlphaONE 4.25
Size (cu. ft.) 4.25
Max Pond Size 10,000 gallons (U.S.)
Flow Rate (gpm) 90 gpm
Fish Load (lbs.) 225 lbs.
Dimensions 24.5" x 35.5"

Energy-Efficient Filtration for Ponds up to 10,000 Gallons

This 4.25 cu. ft. capacity designed to be used on ponds up to 10,000 gallons with fish loads up to a whopping 225 lbs. That's a lot of fish. Easily flows up to 90 gpm while only having a footprint of 24.5" X 35.5".

The AlphaONE filters were designed to be the most energy efficient filters on the market. Inside is more than double the lateral surface area, where the upper beads gather around the slots in the exclusive Omnifuser, than that used on any other filter. Couple this with the highest flow multiport valve on the market and you have a filter that was designed to be energy efficient and perform to your exact expectations.

Reviews (7)

  • Overall rating:
Mike R.
February 6, 2026

I set this up in my 7,000-gallon pond last spring. Water cleared up fast, and the backwash is a breeze. Great build quality and very efficient.

Tom J.
January 8, 2026

Handles a big pond without slowing down. I don’t need to clean it often, which is a huge plus.

Josh K.
November 7, 2025

I have used this product and I’m really impressed with its performance and quality. Highly recommended.

Leo G.
November 6, 2025

There is no compromise on quality—this is truly one of the best products I’ve used.

Evan N.
October 16, 2025

Excellent.

Chris B.
September 17, 2025

Works great. No issues.

Dave K.
March 6, 2025

This filter manages debris really well. The Omnifuser design spreads waste evenly, so no clogging. Less maintenance, clear water, and it's energy friendly. Very happy with it.

Specification Details
Model AlphaONE 4.25
Size (cu. ft.) 4.25
Max Pond Size 10,000 gallons (U.S.)
Flow Rate (gpm) 90 gpm
Fish Load (lbs.) 225 lbs.
Dimensions 24.5" x 35.5"

Energy-Efficient Filtration for Ponds up to 10,000 Gallons

This 4.25 cu. ft. capacity designed to be used on ponds up to 10,000 gallons with fish loads up to a whopping 225 lbs. That's a lot of fish. Easily flows up to 90 gpm while only having a footprint of 24.5" X 35.5".

The AlphaONE filters were designed to be the most energy efficient filters on the market. Inside is more than double the lateral surface area, where the upper beads gather around the slots in the exclusive Omnifuser, than that used on any other filter. Couple this with the highest flow multiport valve on the market and you have a filter that was designed to be energy efficient and perform to your exact expectations.

Reviews (7)

  • Overall rating:
Mike R.
February 6, 2026

I set this up in my 7,000-gallon pond last spring. Water cleared up fast, and the backwash is a breeze. Great build quality and very efficient.

Tom J.
January 8, 2026

Handles a big pond without slowing down. I don’t need to clean it often, which is a huge plus.

Josh K.
November 7, 2025

I have used this product and I’m really impressed with its performance and quality. Highly recommended.

Leo G.
November 6, 2025

There is no compromise on quality—this is truly one of the best products I’ve used.

Evan N.
October 16, 2025

Excellent.

Chris B.
September 17, 2025

Works great. No issues.

Dave K.
March 6, 2025

This filter manages debris really well. The Omnifuser design spreads waste evenly, so no clogging. Less maintenance, clear water, and it's energy friendly. Very happy with it.

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