- Filter Skid System


The PolyGeyser turnkey system offer quick and easy installation, along with automated backwashing. With our PolyGeyser skid systems, you can rest assured that AST’s engineering professionals have done all of the hard work for you. The team has designed the layout, they’ve sized the water pump, and they have installed the external plumbing. These systems come with all of your filtration basics, plus optional UV sterilization. The filtration system is as automated as they come, employing a pneumatic backwash mechanism designed to save time. Suitable for high loads that are typical of aquaculture applications, these filters are capable of handling ammonia loads 50% – 100% higher than standard bead filters. You will be able to lower your overall water and head loss – our innovative backwashing process is gentle enough to protect the biofilm and keep the environment healthy.

  • Prefabricated for quick and easy installation
  • Mounted on a skid for indoor or outdoor use
  • PolyGeyser filter with enhanced media
  • Reliable, gentle backwash operation
  • Optional UV sterilization available
  • Centrifugal pumps with strainer baskets
  • Pump Assisted Backwash Kits for pressurized discharge of backwash waters
  • Plumbed using Schedule 40 PVC
  • Unions at strategic locations for easy maintenance
  • Simply connect a line leading from your pond to the pump suction, and a line leading from the filter outlet back to the pond!

The PolyGeyser filter is a breakthrough in filter technology. It is very different from most filters on the market due to its auto-pneumatic backwash mechanism. Water enters below the bed of enhanced nitrification media and travels upward through the filtration chamber where mechanical and biological filtration take place. Simultaneously, air is introduced into the charge chamber at a constant predetermined rate to achieve the desired backwash frequency.

Once the charge chamber has reached capacity, the pneumatic trigger fires, releasing the entrained air from the charge chamber below the bead bed. The sudden release of air from the charge chamber causes the beads to mix as the air agitates the beads. As the beads drop, the bead bed expands downward while simultaneously water rushes downward through the expanded beads, sweeping the solids away and into the air charge chamber.

In the chamber, the solids settle out from the backwash waters and are later removed from the filter. Essentially, this type of filter recycles the backwash water while concentrating the waste products so that you have extremely low water loss while maximizing the nitrification capacity.

Frequent backwashing has proven advantageous for optimizing the nitrification capacity of a Polygeyser® filters. Numerous gentle scrubbing cycles promotes a higher rate of nitrification by maintaining a healthy thin biofilm on the surface of the bead media. Typical backwash cycles occur every 3-6 hours.

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