ULTIMA II BIO-MECHANICAL AQUA FILTER

Ultima II™ Bio-Mechanical Filtration

Professional Pond Filtration. Crystal Clear Results. Proven for Decades.

The Ultima II™ Bio-Mechanical Filter is AquaUV's flagship filtration system, engineered to deliver exceptional water clarity, superior biological performance, and effortless maintenance for ponds, water gardens, aquaculture systems, and large aquatic environments.

Designed and manufactured in the USA, the Ultima II has earned the trust of professional pond builders, koi enthusiasts, aquatic facilities, and homeowners worldwide by consistently producing healthier water with less maintenance.

At the heart of every Ultima II is AquaUV's patented Cyclonic Backwash™ Technology, a revolutionary cleaning system that thoroughly agitates the filter media during backwashing to remove trapped debris quickly and efficiently. Simply turn the multi-port valve to Backwash and Rinse, and the internal jet system performs the hard work—helping restore optimal flow while reducing maintenance time.

Unlike ordinary mechanical filters, the Ultima II combines advanced mechanical filtration with powerful biological filtration in one compact system. Its uniquely engineered media provides an extensive surface area where beneficial bacteria naturally colonize, converting harmful ammonia and nitrites into less harmful compounds as part of the natural nitrogen cycle. The result is cleaner, healthier water that supports thriving fish and aquatic life.

Whether you're maintaining a backyard koi pond or managing a demanding commercial aquatic installation, the Ultima II is designed to perform under high fish loads and elevated flow rates while delivering dependable, long-term performance.

Why Pond Owners Choose Ultima II™

  • Exceptional water clarity through advanced bio-mechanical filtration
  • Patented Cyclonic Backwash™ system for fast, effective cleaning
  • Supports a healthy biological ecosystem by promoting beneficial bacteria
  • Designed for heavy fish loads and demanding applications
  • Reduces maintenance while maximizing filtration performance
  • Compatible with virtually any properly sized pond pump
  • Ideal for koi ponds, water gardens, aquaculture facilities, and commercial water features
  • Proudly engineered and manufactured in the USA

With multiple models available to accommodate a wide range of pond sizes and flow rates, there is an Ultima II filtration system designed to meet virtually every application.

When water quality matters, professionals choose Ultima II™—the filtration system trusted for decades to deliver cleaner water, healthier fish, and lasting performance.

Find the Right Ultima II™ for Your Application

Whether you're building a tranquil backyard water garden, maintaining a prized koi collection, or designing a large commercial aquatic system, there's an Ultima II™ filtration system engineered to meet your needs.

Our online selection represents many of our most popular models, but we also offer larger-capacity systems, including the Ultima II 10,000, 20,000, 30,000, 30,000 SM, and 60,000 SM filters for higher flow rates and more demanding applications.

If you need assistance selecting the right filtration system or would like information and pricing on our larger models, our Product Specialists are here to help.

Call us or start a live chat today, and one of our knowledgeable AquaUV Product Specialists will help you select the ideal Ultima II™ system based on your pond size, fish load, flow rate, and application.

Experience the difference that decades of innovation, American manufacturing, and industry-leading filtration can make with Ultima II™ from AquaUV.

 

 

FAQ

What is an Ultima II filter and why do I need one?

An Ultima II filter is a bio-mechanical pond/water filter that combines mechanical debris removal with biological filtration. It captures solids while cultivating beneficial bacteria that break down ammonia and other harmful compounds, helping maintain water clarity and a healthy aquatic environment.

How does the Ultima II cyclonic backwash system work?

The cyclonic backwash design uses internal jets to create a vortex that loosens and expels trapped debris. When you switch to backwash mode, the jets rinse the media for you, reducing manual cleaning effort and maintaining filtration efficiency.

Which model should I choose for my pond or system?

Pick a filter whose flow capacity matches or exceeds your pump and system size. Consider factors like pond volume, fish load, and peak flow rates. Oversizing is safer than undersizing. You can also use multiple units in parallel for very large systems.

How often should I backwash or clean the filter?

For moderate loads, backwash every 1–2 weeks. In heavy load or debris environments, you may need to backwash more frequently. Also inspect media and remove blockages during routine maintenance.

Does the filter support biological media or bacteria seeding?

Yes. Ultima II filters are designed to house biological media and are often pre-seeded with beneficial bacteria. These microorganisms convert toxic nitrogen compounds into less harmful forms, contributing to stable water chemistry.

Can the filter handle heavy debris or high organic load?

Yes. The robust design of Ultima II filters is intended for challenging or demanding environments with high particulate loads. The cyclonic action helps prevent clogging and prolongs media life.

Is the filter energy-efficient and low maintenance?

Yes. The mechanical + biological approach reduces the need for constant cleaning. The backwash system automates maintenance, and the units are engineered for minimal pressure drop and efficient flow.

Will the filter improve water quality beyond clarity?

Absolutely. In addition to removing suspended solids, the biological filtration helps reduce ammonia, nitrites, and other nitrogenous waste. A clean, balanced system can reduce algae growth, improve oxygenation, and support healthier aquatic life.