Customer Review

"I can backwash my filter in a tuxedo."

Jim Clingan, Bubble Bead Filter owner since 1995
Used for his home koi pond.

Koi & Home Pond Products



The is an advancement of our patented PolyGeyser® technology with the addition of many new enhancements and increased performance features.

  • 2000 and 4000 models available
  • Automatic pneumatic backwash
  • All-in-one mechanical and biofiltration
  • Lowest water loss filter in the industry
  • Large sludge storage chamber
  • Small footprint

Bubble Bead® Filter

Our simplest bead filter technology, designed for lightly loaded applications.


AST Endurance™ Filter

Perfect for smaller systems, these products feature backwash and purge automation, making maintenance a snap.

PolyGeyser® Filter

PolyGeyser technology boasts an automatic pneumatic backwash mechanism and excellent biofiltration.

High Profile PolyGeyser® Filter

These new filters feature automated backwashing and are capable of handling large volumes of water under pressure, while gently backwashing the media.

Tell Us About Your Project

The team at AST is ready to learn about your needs and assemble a quote for your project. Contact us today!

Koi & Home Pond Projects


  • Tested technology – over 20 years of research and real-world application have proven bead filtration superiority
  • Energy savings – smaller pumps paired with efficient design
  • Low maintenance – backwashing is quick and doesn’t require you to get your hands dirty
  • Longevity – media never needs replacement and is resistant to clogging and channeling
  • Excellent biofiltration – media contains 400ft2 of surface area per cubic foot for the biological breakdown of nitrogenous waste
  • Superior clarification – studies show that our filters remove 100% of particles greater than 50 microns and 48% of particles in the 5-10 micron range per pass
  • Water conserving technology – our newest filters recycle their own backwash water, drastically reducing water loss!
  • One year warranty – if there is a defect in filter manufacturing AST will provide a warranty replacement for up to one year from the date of shipment