Evolution Aqua Nexus 220+ EAZY Pond Filter with K+ Media 4,800 Gallon

Crystal-Clear Water Made Simple With the Evolution Aqua Nexus 220+ EAZY Pond Filter

Tired of murky, green pond water that hides your fish and stresses your aquatic life? Your pond deserves better. The Nexus 220+ EAZY tackles both solids and toxins in one system, pairing powerful mechanical cleaning with living biological treatment so your water stays clear, balanced, and healthy all season long. Set it up once and let it work while your fish flourish.

• Two-Stage Filtration: Combines mechanical cleaning and biological treatment in one system for clear, healthy pond water.
• Pond Size: Handles ponds up to 4,800 gallons.
• Flow Rate: Rated for a maximum of 2,640 gallons per hour.
• Mechanical Stage: Eazy filter holds 18 liters of K1 Micro media to trap fine particles.
• Biological Stage: K+Media Moving Bed comes with 50 liters of media, hosting bacteria and filter feeders that convert Ammonia and Nitrite into less harmful Nitrate.
• Expandable Media: K+Media capacity can be increased up to 150 liters for added biological treatment, though a larger air pump may be needed.
• Solids Handling: Vortex chamber settles out larger solids before finer filtration, keeping the biological stage running smoothly.
• Low Maintenance: Continuous filtration cycle keeps water moving and clean without constant attention.
• Freight Item: Ships via freight delivery.

How the Nexus+ Filter Works

Water travels a full cleaning cycle inside the filter before it ever returns to your pond, and each stage handles a different job.

• Vortex Chamber: Pond water enters through the inlet and flows into the inner chamber, where larger solids settle out and drop away from the rest of the process.
• Eazy Filter: The water then moves through the Eazy filter for mechanical cleaning. A static bed of K1 Micro filter media traps finer particles and pulls them from the water.
• Biological Treatment: Mechanically cleaned water passes to the outer chamber and the K+Media Moving Bed, where bacteria and filter feeders convert harmful Ammonia and Nitrite into less harmful Nitrate.
• Return to the Pond: The treated water exits through the grill, past the exit chamber's overflow bypass, and flows back to your pond, keeping the cycle running continuously.

Because every stage feeds the next, your pond gets consistent water quality without you having to manage each step by hand.

Inside the Nexus+ Filter System

The design keeps mechanical and biological filtration in separate, purpose-built chambers so neither one overloads the other.

• An inner chamber houses the Eazy mechanical stage with its static K1 Micro bed.
• An outer chamber holds the K+Media moving bed for biological treatment across a protected surface area.
• The vortex action drops heavy solids into the settlement area, reducing the load on your finer filtration.
• An airline with 12 mm air valves feeds the moving bed to keep the K+Media in constant motion.
• A large 1.5-inch waste valve and dedicated waste outlet let you flush settled solids straight out of the settlement area.
• A 3/4-inch outer chamber maintenance valve makes servicing the biological chamber simple.

Keeping solids separate from the biological stage means the bacteria colonies stay productive and your water stays clear.

The Living Biological Power Behind the Evolution Aqua Nexus 220+ EAZY Biological Filter

The heart of this system is the K+Media Moving Bed in the outer chamber. This is where the real water chemistry happens.

• The vast, protected surface area hosts various strains of bacteria and filter feeders.
• These microorganisms convert toxic Ammonia and Nitrite into less harmful Nitrate.
• The bed is supplied with 50 liters of K+Media and accepts up to 150 liters maximum if you want to expand its biological capacity. Note that a larger air pump may be required when adding additional media.

Strong biological treatment protects your fish from the invisible toxins that cause the most harm in a stocked pond.

What Makes the Evolution Aqua USA Nexus 220+ EAZY Pond Filter Easy to Maintain

The Eazy filter at the mechanical stage does more than trap particles. Its static bed of K1 Micro media handles the fine work of pulling finer particles from the water, giving you crystal-clear results without constant intervention.

• The Eazy filter holds 18 liters of K1 Micro for mechanical filtration.
• Settled solids collect in the settlement area and can be flushed out through the waste outlet, keeping them out of the biological chamber.
• The continuous filtration cycle keeps water moving and clean around the clock.

Sizing the Nexus+ Nexus 220+ EAZY to Your Pond

Matching your filter to your pond keeps the whole system performing as intended.

• Maximum pond size: 4,800 gallons.
• Recommended flow rate: maximum 2,640 gallons per hour.

Staying within these figures gives the mechanical and biological stages enough contact time to do their work before water returns to your pond.

Specifications and Capacity

Here is how the numbers add up across pond size, flow, and media volumes so you know exactly what this filter can handle.

• Water handling: up to 4,800 gallons of pond volume at a maximum flow of 2,640 gallons per hour.
• Mechanical media: 18 liters of K1 Micro in the Eazy filter.
• Biological media: 50 liters of K+Media supplied, expandable to 150 liters maximum.

Product Specs