Well its time to attempt to build a manifold on the return plumbing. I hopping that every thing can be powered off the fluval sp4. It will be for return,carbon and gfo reactor along with a 25 watt uv, and feeding the fuge. Would this be to much for the pump to handle? Tank sits on a 42" tall stand.
That would be a perfect pump for what you want to do. As for the UV it's a little complicated, bc you need the correct amount of flow thru it to for specific outcome. You best bet is to get a flo meter for the UV and you be straight
Gate valve on the drain and return. Ball on the manifold… .I highly recommend spears valves sch80(grey) or if you go with lowes valves(better selcetion then HD) I would get some lithium grease and lube up the balls��. Learned that from master jedi mace "spinner"