The Aqua Ultraviolet Ultima II 4000 External Pressurized filter is engineered to provide superior filtration for ponds or large aquariums up to 4000 gallons. Ultima II filters meet the environmental demands of koi and other ornamental fish ponds, with rugged design, and heavy duty materials. The revolutionary tubular design of the Ultima II filter media offers 750 square feet of surface area for each cubic foot of media, for superior beneficial bacteria colonization, and efficient mechanical filtration. Features include an internal backwash systems with cyclonic jet action to quickly and completely self clean the filter. Media design prevents clogging, and maintains bacteria during backwash. Ideal for high flow rates and heavy fish loads, Ultima II External Pressurized Pond Filters are the ultimate choice for the distinguished pond keeper. The Ultima II 4000 1 1/2 inch model has a recomended flow rate of 2,000-4,500 gph, the 1 1/2 inch control valve has a maximum flow rate of 4500 gph. For complete product information, see the manufacturer's Installation Guide , and pump sizing Chart .
- The Ultima II 4000 is designed to support aquatic life in bodies of water from 2,000 to 4,000 gallons.
- Optimal Flow Rate 4,000 gph
- Minimum flow 2,000 gph Max flow 4,500 gph
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