Ok, so I made it home before lights out and fed the tank so pay no attention to the particulates.
The return ends up being a double return with bigger outlets for the water.
First pic is of the stock tubing that comes with the FX6. I screwed a 3/4" x 1" - threaded x slip PCV adaptet directly in to the stock hose. It fits very snugly but may leak very slightly. I do not know and, to me, it doesn't matter because I keep it below the water line.
This pic is of a simply built PVC "T" with apropriate fittings to turn a single return into a double return.
I believe the rest of the pics are self explanatory. With exception to the PVC adapter that screws directly into the hose, all fittings are slip and I did not cement any of them. I also used a 3/4" x 1" adapter into a section of 16" of 1" PVC down to a 1" slip x 3/4" threaded fitting into which I have a "strainer" screwed.
I apologize, in advance, for anything that may be confusing as I've been on the go since about 5:00 this morning and did not sleep much last night. So, I'm a little bit on the tired side.
Please feel free to ask any questions and I'll answer when I'm a little better rested. Oh, and don't judge the shoddiness nor condition of things or of the work as I'll be redoing it all as I convert this tank into a fully planted hi-tech system.