On Feb 10, 2013 I started the system with "feeder" goldfish.  I didn't think I needed the filtration set up at first, but the water stayed quite murky, so I did add the filtration

Filtration consist of 1 screen, 2 pebbles, and 3rd 2" thick mesh filter.  The water cleared up over night.

I added a few gallons of existing water, from a friend's system, to help the start up.

Today I set up the 40 feet of 3" pvc for the primary run.  The secondary run will be 20 feet.  I used…