The Answer is a mechanical, self-backwashing fine-screen filter, which is low maintenance and gives excellent water clarity and quality, while protecting the bio stage from unwanted solids.

The Answer mechanical filter is the perfect addition to your Nexus filtration unit.

The Filtration Process
The Answer is designed to fit to exit pipe work within the primary settlement stage or prime mechanical filtration chambers, whether pump or gravity fed, from the pond. The water entering The Answer generally comes from the bottom of the pond and contains dust, leaves and fish feces, amongst other solids. At this stage, it is important to stop all mechanical solids from entering the biological stage, the more mechanically clean the water, the more effectively the biological stage will work ­ hence the development of The Answer.

All water that passes through The Answer is finely filtered. The pump that provides the power and cleaning action draws filtered water from inside of The Answer; it is then pumped into a hollow rotor arm. At each end of the arm are nozzles angled at 45 degrees. Water is pumped through these nozzles and in doing so causes the arm to rotate. Water is forced out at high pressure against the inside of the screen continuously. This causes water to backwash through the screen to the outside. The result is that particles lodged on the outside, which are naturally trying to get through, are forced away and eventually settle at the bottom of the container. Once here, there is no way back and they can be pumped to waste. Therefore, The Answer will run continuously without blocking, protecting the bio-stage and giving excellent clarity.

DRAMATICALLY IMPROVES YOUR FILTER SYSTEM Main Benefits: Gives excellent water quality and clarity ­ therefore provides a healthier environment for your fish! Mechanical self-backwashing fine-screen filter stops mechanical solids from entering the biological stage increasing the bio performance dramatically Gives low maintenance to bio stages Will run continuously without blocking Can be retro-fitted to existing vortex settling chambers

Retrofitting Note the slide valve, which can be fitted inside or outside the chamber if space allows. This means that water can be discharged without wasting good water contained in the bio stage. The important part here is the change we make to the inlet. An elbow or elbow spigot or specially made insert (contact us for details) is placed in the inlet pipe work. A vertical pipe is inserted into the elbow to bring the water in vertically, level or slightly higher than the middle of ‘The Answer’. This has 2 effects, it stops the spin of the water caused
by the tangential entry and secondly it creates a downward flow of water towards the screen of ‘The Answer’. This effect means that every time a particle is removed from the screen, instead of hitting it immediately after the pulse emitted by the arm has passed, it drops down slightly. This removing and dropping of the solids terminates when they reach the lower surface of the unit into what is effectively dead water. Once here, there is no way back and they drop motionless to the bottom of	Typical Vortex with Central Exit
the tank where they can be sumped to waste. If the vortex action were allowed to continue, all the fine matter which ‘The Answer’ stops from passing through, rather than settle out, would be agitated and in suspension of the entire volume of the vortex. It is this alteration to a vortex that gives at least 40% of ‘The Answer’s’ effectiveness. The vertical pipe must never be at water surface level or close to it in case of evaporation of water from the pond. This will cause the flow of water to stop. It will also impede the purging of the bottom drain lines if it is
set too high. It should never be less than 150mm from water surface level. Again our product can be fitted easily, pipe is brought from the outlet to the center, elbowed down and ‘The Answer’ fitted upside-down where it works exactly the same as in the first example. Again, the inlet is changed to give the upward flow of water, which in turn flows downwards to the screen. There are numerous ways as shown to fit it. Even systems with no pipe work and	Vortex with Side Walls
transfer weirs can be adopted easily to accept ‘The Answer’. Weirs are sealed up and pipe fitted through existing walls. The only criterion is space. For the 410 model – the unit measures 410mm wide and 340mm in depth. The unit must be totally immersed in water to be completely effective (the pump immersed as well, if mounted upside-down).
Therefore, as long as the container is sufficiently wide enough to allow the inlet pipe work to come alongside ‘The Answer’, plus 50mm either side for passage of waste matter, the retrofit can be achieved. The smallest container for ‘The Answer’ 410 would therefore be 620mm diameter (if the inlet pipe was 110mm.) There must be a minimum of 250mm below ‘The Answer’ to allow settlement in the still water beneath it. If no space is left for settlement, the action of ‘The Answer’ backwash will cause debris to be whipped up and could increase the maintenance schedule.	Gravity Fed

Pumping direct from the Answer

This application will assist in removing all heavy solids before they enter the bead filter.