The PolyGeyser® filter combines the unit operations of biofiltration – the biological removal of dissolved constituents that can harm your fish, and clarification – the physical removal of particulate matter within the water column, into a single unit. The pneumatic backwash process is fully automated with a built-in sludge storage chamber that allows filter maintenance to be performed in only minutes per week. PolyGeyser® is committed to ongoing research and development to continually improve filter performance in both the biofiltration and clarification areas without compromising the ease of its use.