Many people have asked me how we built our “Radial Flow Filter” (below). While that diy filter is very effective in the 4000 litre system it does require some plastic welding, which most people do not have access to. They also asked for a bit more of an explanation of how the filter actually works.
In any aquaponic or aquaculture system, the rapid removal of solid fecal wastes from the outflow of the fish tank, will improve the water quality. Even when you are using media beds in aquaponics, the addition of solids filtration will reduce cleaning cycles and reduce the overall loading on the media. Basic filters, such as the DIY below, will drastically improve the overall productivity and health of your systems.
A comparison study of a radial flow filter and a swirl filter found an increase in solids removal of 25%. 1. A swirl filter will generally remove up to 23% of the total suspended solids. A radial flow filter removes up to 48%. While this study did you a dual drain outlet, similar results can be achieved without them.
Here is an explanation of how this radial flow filters works along with the drawing and parts so you can add it to your projects.