DYI 150 gal filter (floor scrubbing pads media), water falling into a 200 gal bog/weir and then into pond which keeps the water clear and can carry a very large fish population.

Have a 55 gal drum with cement in bottom to form a vortex that collects heavy fish waste and leafs (drains to sump pump and discharges at end of property) before going to Sequence 1/4 HP 44 gph pump. Bog has a huge drain at bottom of rocks that will self clean.