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Aqua Ultraviolet presents the next generation of filters and the best tool for Koi ponds. The Ultima II is specifically engineered to meet the environmental demands of ponds. The lightweight media is designed for extremely high flow rates. There is a patent pending on this tubular media which has low head loss and an extremely high biofilm surface. The “Y” shape on the inside and wings on the outside affords a protective surface under backwashing and our patent pending backwash system will keep the media from clogging. The same properties have been added to this media in three varied sizes with random lengths and diameters to avoid stacking. One cubic foot of Ultima II media is equal to 750 square feet of surface area. Cleaning the filter is done by internal jets. The Ultima II is also the ideal filter for aquariums where extremely high flow rates are desired.

Product Highlights

  • The Aqua UV Ultima II External Filter is specifically engineered to meet the environmental demands of fishponds
  • The lightweight media is designed for very high flow rates
  • Low head loss
  • Very high biofilm surface

Aqua Ultraviolet Ultima Product Highlight

Additional information

Weight 6 lbs
Dimensions 6 × 6 × 6 in

6 lbs


6 × 6 × 6 in

Additional Information

Includes unions which make inlet and outlet 2" slip fitting.
Minimum Flow Rate: for proper backwashing your pump should have enough pressure to be capable of pumping 6000GPH @10' of head. Magnetic drive or "hybrid" pumps should not be used.
Maximum Flow Rate: 7500 GPH
1 Year Warranty
Recommended flow rate: 3000-7500 GPH

Manufacturer Info

Aqua Ultraviolet Aquarium Supplies
Aqua Ultraviolet, founded in 1975, is a popular manufacturer of ultraviolet sterilizers and bio-mechanical filtration. All Aqua Ultraviolet (also referred to as Aqua UV) products are created, tested and manufactured in their Temecula, CA headquarters. By creating all of their products in-house, Aqua Ultraviolet can perform thorough quality control and even engineer custom designs for special orders. The customer-centric company has a toll-free number with a friendly support staff willing to help you choose the right products and walk you through the installation process. Aqua Ultraviolet’s UV sterilizers are popular among freshwater and saltwater aquarium hobbyists in addition to pond and water gardeners.