It looks as though I have been enlisted to design, help fabricate, and install a filter for a medium sized koi pond with fountain for a local church. It consists of a 16 foot diameter lower basin that hold 3000 gallons or so that has a 6' basin above it. It also has a large statue on top of the upper basin with a water feature. It is rather impressive and was fabricated and shipped here from China.
They already have a decent sized pump hooked up to it to circulate water and run the fountain part of it, but they have no filter. The koi in it don't seem to mind and are doing extremely wel