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Evolution Aqua Cetus Sieve (Gravity)

The Cetus sieve is a totally new, bow screen pre-filter, made using the latest rotational molding technology. With all of its benefits and build quality, it is undoubtedly the best of its kind on the market today, regarding quality and performance! It is designed to efficiently and effectively remove large amounts of mechanical waste from a pond. It can be set-up gravity OR pump fed and has many benefits over the original bow screen technology.

This Cetus has a variable inlet height using the unique patented Pondflow regulation system – for use when gravity fed. This allows water levels within the pond to drop without causing the circulating pump to be starved of water. The Cetus will allow a skimmer or a bottom drain to accept vast amounts of waste without excessive cleaning needed to be carried out. The water must then be pumped to either a normal filter above pond level (Nexus Eazy/Eazy Pod) or to a pressurised filter.

If pump fed, the sieve is placed above pond water level and then the exit water is gravity dropped into your main filter.

The Cetus sieve is a bow screen pre-filter, suitable for pre-filtration of any biological filter including all pressured filters. It is advised that all pressurised filters be pre-filtered using a Cetus to reduce excessive backwashing and maintenance due to heavy solids.


   Can be gravity OR pump fed
   Perfect fit screen so no waste can bypass
   Totally reliable and simple to install
   Plug and Play – comes with flexible boots to
     connect to pipe work 
   Greatly reduced backwashing / maintenance
     of pressurised filters 
   Robust one piece mould –no welded joints – no leaks!
   Large waste collection area which slopes to sump outlet
   Ideal for mechanically filtering skimmer lines 
   Patented float that gives constant flow for
     gravity-fed level fluctuations 
   Maximum flow rate 18,000 litres per hour
   Tri-slot 300 micron wedge wire screen in 316L 
     stainless steel on 100% of surface area
   Increased levels of oxygen