Aqua Ultraviolet Ultima II Model 4000 Filter

The Ultima II does the work of two filters combining both biological and mechanical filtration into one compact package. The Ultima II filter uses a tubular patented media with a very high surface area; this exceptional design feature protects beneficial bacteria during backwash and prevents clumping. The Ultima II filter is preseeded with bacteria, which helps to jump start the filter's growth of beneficial bacteria. Simply by rotating the valve the patented cyclonic backwash system does the dirty work for you. In just minutes the internal jets clean the filter for you.

This is the next generation of filters and the best tool for Koi ponds. The Aqua UV Ultima II External Filter is specifically engineered to meet the environmental demands of fish ponds. The lightweight media is designed for very high flow rates. The tubular Bio-Media has low head loss and a very high biofilm surface. The "Y" shape on the inside and wings on the outside afford a protective surface under backwashing, and with our patented backwash system will keep the media from clogging. The same properties have been added to this media in three different sizes with random lengths and diameters to avoid stacking. The Ultima II tubular bio-media offers the highest surface area for growth of beneficial bacteria. No other backwashable pressurized filter compares. Cleaning the filter is done by internal jets. The Ultima II is also the ideal filter for aquariums where very high flow rates are desired.

Independent laboratory and Field testing has shown the Ultima II out performs all other filters on the market.

• 1-1/2" Inlet and Outlet
• Dimensions: 20-1/2" Diameter x 35" High
• Heavy Flow Rate
• Media will not "Clump Together"
• Rated at 38 PSI Max
• Minutes to Backwash
• Can Be Buried
• Heavy Fish Loads
• Limited 1 Year manufacturer's warranty  (see manual for limitations)

The Ultima II 4000 was designed for bodies of water from 2000 - 4000 gallons.

Optimal flow rate: 4,000 GPH @ 10' of head height.
Direct drive self priming pumps are recommended such as external pumps.

Minimum flow rate: 2000 GPH and a maximum flow of 4,500 GPH

The high flow rate allows you to circulate your pond once every hour, giving you the optimal turn over rate to keep your fish healthy and your pond clear.
What makes the Ultima II Filter Different?