The Answer has been around now for some time, and is in use by many koi-keepers.
There have been some alterations to make it easier for removing the screen for cleaning. Two smaller units have now been produced which makes it suitable for smaller ponds, or where more than one is used.

NOTE. It is important to note the recommendations for maximum flow rate of each unit when planning the size of the pump and/or the requirements of your filtration system.

410mm diameter

336mm deep

100 micron screen

Max flow rate 13,000 litres / 2,863 gals/hr.

325mm diameter

272mm deep

150 micron screen

Max flow rate 10,000 litres / 2,202 gals/hr.

250mm diameter

272mm deep

200 micron screen

Max flow rate 6,000 litres / 1,321 gals/hr.

The Answer is designed to fit into the settlement chamber of the filter system. With a new system a suitable size vortex chamber can be obtained, or it will fit into a Nexus unit.
It can also be retro-fitted into an existing system in many cases although it can be difficult with some settlement chambers. Evolution Aqua's website does explain the necessary requirements, and it can also be used for pumping direct to the filter although this should be avoided if possible. It may in some cases be necessary to purchase a suitable container such as a vortex chamber to house the Answer before the original settlement chamber.

Maintenance consists of removing and cleaning the screens with a garden hose about every 14 days, and probably more often if there is blanket weed in the pond. Koi-keepers in South Wales often need to clean them every two to three days.