Ok Here she is.
Ok You got your basic pump, connected to pvc
It goes to a spray spray bar
Into a bucket of media of your choice, this sits on a shelf above the tank
From under the shelf go into the bottom of the bucket with pvc enough were you a a few inches of sitting water, you dont want all the media wet, you want half wet and half dry
The filtered water then drains back into the tank with the help of gravity, seing as its on a shelf above the tank
heres the finished product, shes been runnin great for 2 months
If you would like more details or any certain pictures or if you plan to make your own and need some more information feel free to ask, i'll be happy to help
The 2 red handles you see on the pvc are simply shut offs, there not required but handie