Aquadyne AD4000 Filter Bead Filtration System with DynaMax Blower

Aquadyne AD4000 Pond Filter Built for Cleaner Water and Less Maintenance

Tired of scrubbing, backwashing, and babysitting your filtration setup? The AD4000 keeps your water clear with almost no hands-on work, handling up to 85 pounds of fish in a compact footprint. Its DynaMax blower does the heavy lifting, blasting trapped debris loose so a quick backwash flushes it all away. You get more time enjoying your fish and less time fussing over equipment. This model was previously known as the Classic Aquadyne 1.1B.

• Fish Load: Supports up to 85 pounds of fish with once-a-day feeding.
• Self-Cleaning Power: DynaMax blower loosens trapped debris so backwashing clears it out fast.
• Low Water Use: Backwashing takes only about 30 gallons at a time.
• Filtration Media: 1.1 cubic feet (40 lbs) of bead media for mechanical and biological filtration.
• Pond Coverage: Rated for ponds up to 4000 gallons.
• Pump Compatibility: Works with pumps rated 1,000 to 4,000 GPH, including submersible models.
• Pressure Rating: Runs at 0 to 1 psi at 2000 GPH on a clean cycled filter, with a 50 psi maximum.
• Easy Plumbing: 1-1/2" ports throughout, with 3 pre-assembled schedule 80 unions included.
• Best Fit: Ideal for indoor large volume aquariums, lab research setups, and alternative species exhibits.
• Compact Size: Measures just 18"D x 38"H for a small footprint.

How the DynaMax Blower Keeps This Filter Cleaning Itself

The DynaMax blower is what makes this filter so easy to live with. Instead of relying on water flow alone, it aggressively agitates the debris collected in the media bed and lifts it into the water column.

• Suspends waste for easy removal so it flushes straight to waste during backwashing.
• Uses only about 30 gallons per backwash with the blower engaged, keeping water waste low.
• Compatible with the Dyna-Max Air Assist option for even more cleaning power.

The result is a filter that stays efficient between cleanings without demanding constant attention.

Big Biological Filtration From the Aquadyne AD4000 Bead Filter

Packed inside is 1.1 cubic feet of bead media, weighing in at 40 pounds. That bead bed traps solids and hosts the beneficial bacteria that break down waste, giving you both mechanical and biological filtration in one tank.

• Supports up to 85 pounds of fish while feeding once per day.
• 1.1 cubic feet of media volume for strong particle capture and biological activity.
• Runs at just 0 to 1 psi at 2000 GPH on a clean cycled filter, so your pump works less.

Where the Aquadyne AD4000 Model Filter Fits Best

This system is well suited to medium to moderately sized indoor large volume aquariums and more heavily stocked laboratory research applications. It also performs well for medium to moderately sized aquatic environments used in alternative species exhibits. Rated for ponds up to 4000 gallons, it delivers serious capacity in a package measuring just 18"D x 38"H.

Flexible Pump Options With the Aquadyne AD4000

Match the filter to the pump you already have. The AD4000 works across a wide flow range and even pairs with submersible pumps with ease.

• Pump size range of 1,000 to 4,000 GPH for flexible setups.
• Works with submersible pumps without added hassle.
• Handles up to 50 psi maximum pressure.

Simple Plumbing and Quick Connections Make Installation Easy

Installation stays straightforward thanks to the included fittings. Every port uses 1-1/2" plumbing, and you get high quality quick disconnect unions right in the box.

• 3 pre-assembled schedule 80 unions with pre-mounted male adapters.
• Self-sealing 1-1/2" unions for clean, leak-resistant connections.
• 1-1/2" plumbing on all ports for consistent flow.

Product Specs