[Chad]

I added a line off my return pump to use for any reactors I want. If you don't have that then it will need its own small pump.

The unit can go right in the sump. Actually, that's where I prefer it. It can go outside of the sump as well, but for me if it springs a leak I don't want it on the floor.

 

[Chad]

The pump on a skimmer is just for the skimmer. It's possible to work in a return pump to run a skimmer as well if you want using pipes and valves and whatnot.