So the 265 is about to get moved to its new room finally, ghost overflow is being installed and now its time for the sump. Currently its running a 40 breeder and a 30g acrylic sump. I am torn between running a 40breeder and 50 tall. or two 40 breeders. I would like to have room for dosing containers and reactors, I could possibly remote the reactors and dosing containers, I just dont know how well the dosing pump will pull the fluid across the room, I could mount the dosing containers higher and let gravity do most of the work. Just torn between running the 40/50 which would give me 6 extra inches. or the twin 40s. The other debate im running through my head is 3/4" or 1" Return fittings into the tank.