- Water, gravity or pump fed, flows into the inlet of the unit and enters the primary settlement vortex which is the main mechanical stage of the filter. The Answer* sits in the central chamber of the Nexus and prevents all solids over 200 microns from entering the biological stage.
- The bio-filter stage consists of the Kaldnes Moving Bed™ Process*. An air ring at the base of the out side bio-chamber releases air into the biofillter, agitating the media, which the bacteria colonise, thereby creating an optimum environment for the nitrification process to function.
- The water then flows through the bio-filter chamber, out through the exit chamber with the static media and returns to the pond.

* The Answer is robustly engineered out of stainless stell and a proven technolagy within the industry. The pump that provides the power and cleaning action, draws filtered water from inside the Answer. It is then pumped into a hollow rotor arm. At each end of the arm are nozzles angled at 45 degrees. Water pumped through these nozzles cause the arm to rotate, spraying water again the inside of the screen. In this action solids are swept away from the outside of the screen to settle out at the base of the vortex chamber.
* Kaldnes bio-media has been proven to be many times more efficient than other media. This uniquely designed media provides amazing water quality and clarity, especially when it has reached full maturity. Kaldnes bio-media is maintenance free allowing the biomass to fully mature, which maximises its effectiveness and creates constant parameters.

Why the Nexus 2000 or 3000...?

• used extensively in fish farming
• long periods between maintenance
• unbeatable water quality and clarity
• zero maintenance within the biological stage
• easy to install - ‘plug and play’
• uses scientifically proven Kaldnes
  Moving Bed™ technology
• unparalleled value for money
• complete professional system gravity fed only

• no need for a high pressure and costly circulating pump
• small footprint
• low running costs