The PolyGeyser beadfilter is a real revolution in filter technique. Designed by the father of the Bubble Bead filter; Dr. Ron Malone. The PolyGeyser beadfilter is automatically self-cleaning without moving parts or electronics, contains EN (Enhanced Nitrification) media  that offers 50% to 100% greater nitrification than standard beads, and is capable of providing mechanical filtration down to 5 micron particle size.

The PolyGeyser filter can be installed underneath or above water level. Any low Watt water pump like  Sequence or Oase can be used as a circulation pump.
The PolyGeyser has the lowest possible pressure loss because it uses no multiport-valve. In and outlets are 3” (±75mm). It’s already being used in aquaculture, and now it’s ready for koi ponds.