Thanks Dead sled... The system is already built. I'm posting pictures as I get a chance.


Here's the layout for the fish tank and filters...




This is the radial flow with a drain installed...





Here's another shot where you can see the bio filter (2nd tank). The water drains from it and goes to the rock beds, which one can be seen in the background....





Here's the (clean) sump. It's a 55 gal barrel that we buried in the ground...it pumps back to the fish tank. Note the spray bar...





The sump is to the right, just out of site in this picture. This was the last time I saw the system. We had the water actually flowing through the 2 troughs with liners....