u have a build in overflow, right?
so all u need is a return pump and some PVC
pipes, I m putting my sump together right now, its really not that hard when u try. XD
I thought its hard at first, but now I got everything in my hand, it easy haha
does your 20gal sump tank has divider?
if not get some glass piece from Home depot or other local store, use silicone to make the divider.
Thanks to AMD, HN1, Zero, partypalooza, thincat, and thominil who helped me in almost every questions. Thanks everyone!!!!!