I have a manifold I made from PVC that supplies my return, two media reactors and I have one extra "line" for another reactor plus a ball valve that goes over to the start (for lack of a better term) of my sump. You basically just need a few T's, a couple 90's and a few ball valves (to control flow). This would let you supply multiple gadgets with one pump and give you control over the pressure or flow each device gets (including your return if you wanted). Your only problem will making sure you have the proper flow through the reactor and chiller. You could do this with a gallon jug or five gallon bucket, a stop watch and some math but it's probably easier said than done. Still, I'd personally rather do that than daisy chain.