The Bio Filter Completed

I hope this site has given ideas to those interested of how to build a biological filter. Working with nature can be a challenge but it is the key to a successful co-habitation.

THE END

Another view of the completed Biofilter.

The outer shell of the mechanical filter is also fitted the same way. You can also see the outlet pipe it's about an inch short below the top of the 100mm pipe. This will enable to take the screw top off without the water pouring in - I have not glued it yet as I want to test it out first. The mechanical filter (A netted bag housing a soft sponge/s) fits between the inner pipe and the outer pipe. The outer pipe has four 20mm holes drilled down the bottom, just above the retaining flange.

Another view of the drain outlet (left) and the water inlet. Those flanges work a treat. Plenty of silicone underneath, 2 stainless steel screws to hold in place and PVC glue between the flange and the pipe. Another flange is fitted on the other side, same technique.

The drain was fitted as well as the water inlet and an elbow to the outlet port. The height of the pipe fitted to the outlet elbow will determine how high the water level will go.

Putting it Together

Once I had all the parts, putting together was easy.

First the holes for the drain and inlet were drilled. The outlet was already there.

These are the parts of the inner core for the mechanical filter.

The flange will be siliconed and screwed down to the base, supporting the coloumn. Holes will be drilled just above the flange to let the water out.